Our brains are amazingly versatile, but we find it hard to calculate in our heads because they can store only so many numbers.

According to a famous bit of 1950s research by psychologist George Miller, we can remember typically 5–9 digits (or, as Miller put it: “the magical number seven, plus or minus two”) before our brains start to ache and forget.

That’s why people have been using aids to help them calculate since ancient times. Indeed, the word calculator comes from the Latin calculare, which means to count up using stones.

• What is a Calculator?
• How Does a Calculator Work?
• Benefits of Calculator
• Types of Calculator
• Calculator Apps

What is a Calculator?

An electronic hardware device or software capable of performing mathematical calculations such as addition, multiplication, subtraction, or division. The Casio Computer Company developed the first electronic calculator in 1957.

Since then, calculators have come in many sizes, and are also built into most operating systems on computers, smartphones, and tablets. 

How Does a Calculator Work?

Most calculators rely on integrated circuits more commonly known as chips. Integrated circuits contain transistors that can be turned on and off with electricity to perform mathematical calculations.

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The most basic calculations are addition, subtraction, multiplication, and division. The more transistors an integrated circuit has, the more advanced mathematical functions it can perform.

Today’s scientific calculators, for example, can perform incredibly advanced mathematical calculations.

Like all other electronic devices, calculators work by processing information in binary form. We’re used to thinking of numbers in our normal base-ten system, in which there are ten digits to work with: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

The binary number system is a base-two system, which means there are only two digits to work with: 0 and 1. Thus, when you input numbers into a calculator, the integrated circuit converts those numbers to binary strings of 0s and 1s.

The integrated circuits then use those strings of 0s and 1s to turn transistors on and off with electricity to perform the desired calculations.

Since there are only two options in a binary system (0 or 1), these can easily be represented by turning transistors on and off, since on and off easily represent the binary options (on = 0 and off = 1 or vice versa).

Once a calculation has been completed, the answer in binary form is then converted back to our normal base-ten system and displayed on the calculator’s display screen.

Most calculator displays use inexpensive technologies common today, such as liquid crystal displays (LCD) or light-emitting diodes (LED).

Benefits of Calculator

The calculator has had a profound impact on the world, making computations quicker and more exact.

In the classroom, calculators have given many students the ability to learn about and put complex formulas and concepts into practice more easily.

Especially in lower-grade mathematics courses, some instructors still don’t allow their use to make sure students truly understand mathematical concepts and learn problem-solving techniques.

But for many calculus and trigonometry courses in high school, for example, graphing calculators are a requirement.

Types of Calculator

A calculator is a device that can be used to make many different types of mathematical calculations, so there are many different types of calculators to handle the different functions.

The designs and sizes of calculators vary based on what they are to be used for. Some calculators are designed for specific purposes, such as different trades or businesses, while others can be used just for basic mathematical calculations, like addition and multiplication.

Simple Calculator

The most simple mathematical operations: addition, subtraction, multiplication, division. This is a simplified version of the online calculator.

Addition

The addition (sum function) is used by clicking on the “+” button or using the keyboard. The function results in a+b.

Subtraction

The subtraction (minus function) is used by clicking on the “-” button or using the keyboard. The function results in a-b.

Multiplication

The subtraction (minus function) is used by clicking on the “-” button or using the keyboard. The function results in a-b.

Division

The division (divide function) is used by clicking on the “/” button or using the keyboard “/” key. The function results in a/b.

Sign

The sign key (negative key) is used by clicking on the “(-)” button or using the keyboard “m”key. The function results in -1*x.

Square

The square function is used by clicking on the “x^2” button or using the keyboard shortcut “s”. The function results in x*x

Square Root

The square root function is used by clicking on the “x” button or using the keyboard shortcut “r”. This function represents x^.5 where the result squared is equal to x.

Inverse

Multiplicative Inverse (reciprocal function) is used by pressing the “1/x” button or using the keyboard shortcut “i”. This function is the same as x^-1 or dividing 1 by the number.

Exponent

Numbers with exponents of 10 are displayed with an “e”, for example 4.5e+100 or 4.5e-100. This function represents 10^x. Numbers are automatically displayed in the format when the number is too large or too small for the display.

To enter a number in this format use the exponent key “EE”. To do this enter the mantissa (the non exponent part) then press “EE” or use the keyboard shortcut key “e” and then enter the exponent.

Percent

The percent function is used by clicking on the “%” or using the keyboard. The percent function is used to add, subtract, multiply, or divide a percent of a number. It’s used to calculate the percent of a number. Here are some examples:

73+4.5% = 76.285.

18/80% = 1.25.

Memory Functions

The memory functions allows you to store and recall calculations using a temporary stack storage element.

1. The memory plus function is used by clicking on the “M+” button. This adds the value to whatever is stored in memory (initially this value is zero).
2. The memory minus function is used by clicking on the “M-” button. This subtracts the value from whatever is currently stored in memory.
3. The memory recall function is used by clicking on the “MR” button. This recalls the value from the memory and places it into the working area. The value is still kept in memory.
4. To clear the memory value, click on the “clear” button twice.

Google Calculator

The Google Calculator is a pretty simple calculator, but it’s nicely designed and easy to use. You can add, subtract, multiply, and divide (of course), but there are also basic trigonometric, logarithmic, and exponential functions. It even has an Android Wear version.

As stated previously, it comes preloaded with all Google phones and tablets, and even other phones like my Moto G5S Plus, but it can be installed on virtually any Android device.

In case you were wondering, it’s hard to pinpoint any sales figures from this. Not only is the app available to all for download, but it also comes preloaded on devices from other manufacturers.

All we can say for sure is that this means Google has sold fewer than 100 million devices since March 2016, when the app was uploaded to the Play Store for easier updates, but that’s not much of a statistic.

Even that isn’t necessarily accurate, as Google devices that came before Calculator was uploaded to the Play Store would have downloads counted when they began to use the Play Store for updates.

Calculator App

Most people won’t need to look much further than the stock calculator app on their phone. Google’s calculator app is also pretty decent as a very basic replacement. Thus, we’ll focus more on some of the more complex calculators you can find on mobile. Here are the best calculator apps for Android.

Calc

Price: Free / Up to $1.49

Calc is a calculator app from the developers of, oddly enough, Today Weather. The developers did weather right and they also nailed the calculator app space as well.

This is a simple, functional calculator app with a fairly typical UI. Some of the features include the ability to re-use old answers in your next calculation, a calculator history, and themes.

It’s great for simple use, although some users complain about the advertising strategy and a few bugs here and there. We don’t recommend using this for your collegiate level trigonometry class, but it should do fine to help divide up a lunch check.

ClevCalc

Price: Free

ClevCalc is kind of an all-in-one solution for calculator apps. It has a general use calculator with your usual operators. It also contains simple trigonometric and logarithmic functions.

However, the thing that sets this calculator apart is all of the other stuff it can do. Some of its additional functionality includes currency conversion, unit conversion, a unit price calculator, and a variety of other tools.

Another example is a discount calculator. You enter in the price and the percentage off and the app will tell you its new retail price. We encourage you to check out the Play Store description for the full list because it is rather lengthy.

Financial Calculators

Price: Free

Financial Calculators is a series of calculators to help you make sense of your finances. It features dozens of modes that can help you quickly and easily calculate anything from 401k contributions to student loan repayment, home loan interest, and even how many taxes you owe out of each paycheck.

There have been a few bugs reported with a few of the modes, but the vast majority of them work perfectly. Anybody who needs help with calculating their finances should check this out. It’s completely free with no in-app purchases. It does have ads, though.

HiEdu Scientific Calculator

Price: Free / $1.49

HiEdu Scientific Calculator is a surprisingly good scientific calculator. It does all of the basics correctly as it should. It also works with more advanced stuff like logarithms and other such things.

The UI is clean and simple and the app includes over 1,000 math formulas. It adheres to the modern PEMDAS/BOMDAS method rather than the antiquated version. That may upset some people, but it’s still factually accurate. The pro version runs for $1.49.

MyScript Calculator 2

Price: $2.99

MyScript Calculator 2 is one of the more entertaining calculator apps for Android. It lets you write out your equation. The app uses OCR to translate it into text format and then helps you solve the problem.

It’s easy to use, fun for kids and adults, and there’s a certain satisfaction with writing out the equation yourself. The app supports basic operations, powers, roots, exponentials, some trigonometry, logarithms, constants, and more.

Thus, it’s usually good enough through high school and up through the collegiate levels for most people. However, those dabbling in super complicated math will max this app out fairly quickly.

Digitalchemy calculator apps

Price: Free

Digitalchemy is a developer on Google Play. They have three total calculator apps. The first is Calculator Plus. It’s a basic calculator that does everything you’d expect a calculator app to do.

The second is Fraction Calculator. Its main focus is fractions. It lets you make calculations using them without breaking them down into decimal format.

This is excellent for early mathematics, especially kids. The final one is Artful Calculator. It’s essentially just Calculator Plus but with more artsy themes.

Desmos Graphing Calculator

Price: Free

Demos Graphing Calculator is a good mobile substitute for the more popular graphing calculators. It can do the basic stuff like most calculator apps.

There is also a full assortment of scientific calculator options. It can also do graphs, tables, stats, and more. Graphs are interactive with tons of data to share.

Additionally, tables and stats are customizable. It’ll work well for most types of academia. It’s completely free with no in-app purchases.

Percentage Calculator

There are many formulas for percentage problems. You can think of the most basic as X/Y = P x 100. The formulas below are all mathematical variations of this formula.

Let’s explore the three basic percentage problems. X and Y are numbers and P is the percentage:

1. Find P percent of X
2. Find what percent of X is Y
3. Find X if P percent of it is Y

Read on to learn more about how to figure percentages.

1. How to calculate percentage of a number. Use the percentage formula: P% * X = Y

Example: What is 10% of 150?

• Convert the problem to an equation using the percentage formula: P% * X = Y
• P is 10%, X is 150, so the equation is 10% * 150 = Y
• Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10
• Substitute 0.10 for 10% in the equation: 10% * 150 = Y becomes 0.10 * 150 = Y
• Do the math: 0.10 * 150 = 15
• Y = 15
• So 10% of 150 is 15
• Double check your answer with the original question: What is 10% of 150? Multiply 0.10 * 150 = 15

2. How to find what percent of X is Y. Use the percentage formula: Y/X = P%

Example: What percent of 60 is 12?

• Convert the problem to an equation using the percentage formula: Y/X = P%
• X is 60, Y is 12, so the equation is 12/60 = P%
• Do the math: 12/60 = 0.20
• Important! The result will always be in decimal form, not percentage form. You need to multiply the result by 100 to get the percentage.
• Converting 0.20 to a percent: 0.20 * 100 = 20%
• So 20% of 60 is 12.
• Double check your answer with the original question: What percent of 60 is 12? 12/60 = 0.20, and multiplying by 100 to get percentage, 0.20 * 100 = 20%

3. How to find X if P percent of it is Y. Use the percentage formula Y/P% = X

Example: 25 is 20% of what number?

• Convert the problem to an equation using the percentage formula: Y/P% = X
• Y is 25, P% is 20, so the equation is 25/20% = X
• Convert the percentage to a decimal by dividing by 100.
• Converting 20% to a decimal: 20/100 = 0.20
• Substitute 0.20 for 20% in the equation: 25/0.20 = X
• Do the math: 25/0.20 = X
• X = 125
• So 25 is 20% of 125
• Double check your answer with the original question: 25 is 20% of what number? 25/0.20 = 125

Remember: How to convert a percentage to a decimal

• Remove the percentage sign and divide by 100
• 15.6% = 15.6/100 = 0.156

Remember: How to convert a decimal to a percentage

• Multiply by 100 and add a percentage sign
• 0.876 = 0.876 * 100 = 87.6%

Calculator Soup

Calculator Soup is a free online calculator resource. Here you will find loan, mortgage, time value of money, math, algebra, trigonometry, fractions, physics, statistics, time & date and conversions calculators.

Many of the calculator pages show work or equations that help you understand the calculations. If you don’t find what you need, we are always happy to consider requests for new calculators or additional features and information.

Money Conversion Calculator

This is a very nice money conversion calculator with correct monetary exchange rates that are updated regularly. A money conversion calculator is especially useful for foreigners traveling to a country with their own money.

Before going to a bank or an ATM to do the foreign exchange, you should know what the current money exchange rate is by using this money conversion calculator. It is easy and cheap (no cost at all) to use this money conversion calculator, so you should enter an amount and watch it be converted by the exchange rate calculator.

This currency convertor is up to date with exchange rates from August 6, 2020.

Money Inflation Calculator

The Inflation Calculator utilizes historic consumer price index data from the U.S. to determine how much a fixed list of commonly used items or services, used to track inflation and known as a “market basket,” is worth, adjusted for a given year. Simply enter an amount and the year it pertains to, followed by the year the inflation-adjusted amount pertains to.

There is also a Forward Flat Rate Inflation Calculator and Backward Flat Rate Inflation Calculator that can be used for theoretical scenarios to determine the inflation-adjusted amounts given an amount that is adjusted based on the number of years and inflation rate.

Historically, inflation rates hover around 3% in the U.S. and many other developed countries, making it a safe assumption. However, feel free to adjust as needed.

How is Inflation Calculated?

In the U.S., the Department of Labor is responsible for calculating inflation from year to year. Usually, a basket of goods and services on the market are put together and the costs associated with them are compared at various periods. These figures are then averaged and weighted using various formulas and the end result in the U.S. is a number called the Consumer Price Index (CPI).

As an example, to find the inflation from January 2016 to January 2017, first look up the CPI for both months. Historical CPI data can be found on The Bureau of Labor Statistics website:

Jan. 2016: 236.916
Jan. 2017: 242.839

Calculate the difference:

242.839 – 236.916 = 5.923

Calculate the ratio of this difference to the former CPI:

5.923/236.916 = 2.5%

The inflation from January 2016 to January 2017 was 2.5%. When the CPI for the former period is greater than the latter, the result is deflation, rather than inflation.

Money Market Account Calculator

This money market account (MMA) calculator lets you work out the compound interest you will earn on your money market account based on how much you deposit to start with, how long you’ve had the account, the interest rate on the account, and the amount you periodically deposit. They can also give you a detailed printout of the balance for your MMA and the interest you earn.

Using the MMA calculator is quite simple, just go through these directions step-by-step:

1. Input your initial deposit
2. Input your interest rate and compound frequency
3. Input how many years you’d like the calculator to work out your MMA interest for
4. Input the periodic deposit amount for the frequency you’ve chosen
5. Use the drop-down menu to select your currency (if desired)
6. Click on “Calculate” to get your results.

MoneyChimp Compound Interest Calculator

Compound interest – meaning that the interest you earn each year is added to your principal, so that the balance doesn’t merely grow, it grows at an increasing rate – is one of the most useful concepts in finance.

It is the basis of everything from a personal savings plan to the long term growth of the stock market. It also accounts for the effects of inflation, and the importance of paying down your debt.

BMI Calculator

The Body Mass Index (BMI) Calculator can be used to calculate BMI value and corresponding weight status while taking age into consideration. Use the “Metric Units” tab for the International System of Units or the “Other Units” tab to convert units into either US or metric units. Note that the calculator also computes the Ponderal Index in addition to BMI.

Calculator For Mortgage

Mortgage calculators are automated tools that enable users to determine the financial implications of changes in one or more variables in a mortgage financing arrangement. Mortgage calculators are used by consumers to determine monthly repayments, and by mortgage providers to determine the financial suitability of a home loan applicant.

The major variables in a mortgage calculation include loan principal, balance, periodic compound interest rate, number of payments per year, total number of payments and the regular payment amount. More complex calculators can take into account other costs associated with a mortgage, such as local and state taxes, and insurance.

Mortgage calculation capabilities can be found on financial handheld calculators such as the HP-12C or Texas Instruments TI BA II Plus. There are also multiple free online free mortgage calculators, and software programs offering financial and mortgage calculations.

Calculator For Car Loan

Shopping for an auto loan may not be as exciting as shopping for a car, but if you calculate car payments before you visit the dealership, you may end up saving money. Use this auto loan calculator to estimate monthly car payments and find the lowest rates available. Then you can shop for the vehicle that fits your budget and negotiate the best deal.

Auto loan calculator will give you a good idea of how much car you can afford from a monthly payment standpoint. Start with a list of vehicles that you’re interested in and estimated purchase prices. Then subtract the amount of money you can use for a down payment and an estimate of your current car’s trade-in value.

Lastly, compare costs to make sure that the calculated auto loan payment based on the amount you need to borrow aligns with your monthly budget.

GPA Calculator

Use this calculator to calculate grade point average (GPA) and generate a GPA report. If you use percentage grades, have grades on a different scale or in high school with AP/IB classes, please change the “Settings” to input specific values. Also use the settings to group courses into semesters or to include past GPA.

Calculator Fractions

Use this fraction calculator for adding, subtracting, multiplying and dividing fractions. Answers are fractions in lowest terms or mixed numbers in reduced form.

Input proper or improper fractions, select the math sign and click Calculate. This is a fraction calculator with steps shown in the solution.

If you have negative fractions insert a minus sign before the numerator. So if one of your fractions is -6/7, insert -6 in the numerator and 7 in the denominator.

Sometimes math problems include the word “of,” as in What is 1/3 of 3/8? Of means you should multiply so you need to solve 1/3 × 3/8.

To do math with mixed numbers (whole numbers and fractions) use the Mixed Numbers Calculator.

Ovulation calculator

Knowing the days you are most likely to be fertile can increase your chance of getting pregnant. The typical menstrual cycle is 28 days long, but each woman is different. There are about 6 days during each menstrual cycle when you can get pregnant. This is called your fertile window. Use the calculator to see which days you are most likely to be fertile.

This ovulation calculator provides an estimate of your fertile window and is not a guarantee of pregnancy or of birth control. The calculator and information on this website are not medical advice. Talk to your doctor or nurse to plan for pregnancy and find birth control that works for you.

Matrix Calculator

A matrix, in a mathematical context, is a rectangular array of numbers, symbols, or expressions that are arranged in rows and columns. Matrices are often used in scientific fields such as physics, computer graphics, probability theory, statistics, calculus, numerical analysis, and more.

The dimensions of a matrix, A, are typically denoted as m × n. This means that A has m rows and n columns. When referring to a specific value in a matrix, called an element, a variable with two subscripts is often used to denote each element based on their position in the matrix. For example, given a_i,j, where i = 1 and j = 3, a_1,3 is the value of the element in the first row and the third column of the given matrix.

Matrix operations such as addition, multiplication, subtraction, etc., are similar to what most people are likely accustomed to seeing in basic arithmetic and algebra, but do differ in some ways, and are subject to certain constraints.

Exponents Calculator

This is an online calculator for exponents. Calculate the power of large base integers and real numbers. You can also calculate numbers to the power of large exponents less than 1000, negative exponents, and real numbers or decimals for exponents.

For larger exponents try the Large Exponents Calculator

For instructional purposes the solution is expanded when the base x and exponent n are small enough to fit on the screen. Generally, this feature is available when base x is a positive or negative single digit integer raised to the power of a positive or negative single digit integer.

Also, when base x is a positive or negative two digit integer raised to the power of a positive or negative single digit integer less than 7 and greater than -7.

Bitcoin Calculator

The Bitcoin is the currency in no countries. The United States Dollar is the currency in American Samoa (AS, ASM), British Virgin Islands (VG, VGB, BVI), El Salvador (SV, SLV), Guam (GU, GUM), Marshall Islands (MH, MHL), Micronesia (Federated States of Micronesia, FM, FSM), Northern Mariana Islands (MP, MNP), Palau (PW, PLW), Puerto Rico (PR, PRI), United States (United States of America, US, USA), Turks and Caicos Islands (TC, TCA), Virgin Islands (VI, VIR), Timor-Leste, Ecuador (EC, ECU), Johnston Island, Midway Islands, and Wake Island.

The United States Dollar is also known as the American Dollar, and the US Dollar. The symbol for BTC can be written BTC. The symbol for USD can be written $. The United States Dollar is divided into 100 cents. The exchange rate for the Bitcoin was last updated on August 6, 2020 from coinmarketcap.com.

The exchange rate for the United States Dollar was last updated on August 6, 2020 from The International Monetary Fund. The BTC conversion factor has 12 significant digits. The USD conversion factor has 6 significant digits.

JavaScript Calculator

Anyone who starts with a new language has to hassle a lot to learn various modules before working on real industry-specific projects. As we are familiar with a general convention of starting out with our “hello world” programs, there are few programs which we can practice for learning the basics of any language.

If you ever tried learning systematically, there is no doubt that you haven’t encountered “building a calculator” phase. So, today we are going to build a basic calculator using JavaScript.

JavaScript, better known as the “scripting language” of web pages, can do wonders. A calculator, as we know, will perform our basic operations viz. Addition, Subtraction, Multiplication, and division. For starting out, you should be familiar with HTML and CSS. The section with JavaScript code, we’ll take care of that.

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If you’re new to website development, you should know that one needs a local server to test out codes before deployment. You can go for wamp, xampp or any other server.

For writing your codes, there are so many options: Sublime Text 3, NetBeans, Brackets, etc. Once you’re through with setting up platforms, rest of the work is a cakewalk.

To link various files, you can use the following:

Embedding CSS

• Inline CSS: When we want to add CSS to our desirable elements, Inline CSS is our call. If you’re new to development, chances are you prefer inline CSS over other types. This is good for a head start, but is certainly not SEO friendly.
• Internal or Embedded CSS: The CSS properties and rules are set within the same HTML document, specified by <style></style> tags in the <head> section.
• External CSS: A separate CSS file with the style attributes linked with the main file in the root directory.

In our JavaScript calculator, we’ll be using Internal CSS. First, we need to figure out how many buttons we are going to need. For now, we stick to the minimum viable functionalities for our basic calculator. So, the list of elements are mentioned below:

1. Display Screen: This will be used for user inputs as well as output results. Even if we develop the complete calculator, there is no point of using it without a real time display screen.
2. Buttons: We are going to need 17 buttons atleast for a basic calculator:

• Numbers: The buttons for numbers are required. We need 10 buttons for this category. 1-9 and a 0.
• Operations: For the four basic operations, we need 4 buttons.
• Others: For decimal, clear and Result, we need 3 more buttons.

To visualize the calculator, it is better if we consider forming a table. A table is nothing, but rows and columns. The visible parts go into the body section facilitated by CSS. The part which is not visible, is the JavaScript, that goes into <style> section.

The JavaScript Section

This section will include the display, solve and clear functions.

1. Display Function: This function only displays the user input, followed by results. We just an id which can be called by “document.getElementById”. Here, the id is “edu”.
2. Solve Function: eval() is a gobal function in JavaScript and has a defined purpose of solving JavaScript codes.
3. Clear Function: We just need a void in between the quotes to perform this function.

<script>//function for displaying valuesfunctiondis(val){document.getElementById("edu").value+=val&nbsp;}//function for evaluationfunctionsolve(){letx = document.getElementById("edu").valuelety = eval(x)document.getElementById("edu").value = y}//function for clearing the displayfunctionclr(){document.getElementById("edu").value = ""}</script>

The Visible Section

1. Title: You can write anything here, we prefer calling it “Edureka JavaScript Calculator”.
2. Table creation: Every row must have buttons and input fuctions. For display screen, we need an input type of text with a <colspan> since we require lengthier strings. The others remain with button types.
3. The displays are only onclick() functions here, so we use our dis() function here.

<!-- create table --><body><div class= title >Edureka JavaScript Calculator</div><table border="1"><tr><td><input type="button"value="c"onclick="clr()"/> </td><td colspan="3"><input type="text"id="edu"/></td><!-- clr() functionwill call clr to clear all value --></tr><tr><!-- creating buttons and assigning values--><td><input type="button"value="+"onclick="dis('+')"/> </td><td><input type="button"value="1"onclick="dis('1')"/> </td><td><input type="button"value="2"onclick="dis('2')"/> </td><td><input type="button"value="3"onclick="dis('3')"/> </td></tr><tr><td><input type="button"value="-"onclick="dis('-')"/> </td><td><input type="button"value="4"onclick="dis('4')"/> </td><td><input type="button"value="5"onclick="dis('5')"/> </td><td><input type="button"value="6"onclick="dis('6')"/> </td></tr><tr><td><input type="button"value="*"onclick="dis('*')"/> </td><td><input type="button"value="7"onclick="dis('7')"/> </td><td><input type="button"value="8"onclick="dis('8')"/> </td><td><input type="button"value="9"onclick="dis('9')"/> </td></tr><tr><td><input type="button"value="/"onclick="dis('/')"/> </td><td><input type="button"value="."onclick="dis('.')"/> </td><td><input type="button"value="0"onclick="dis('0')"/> </td><!-- Evaluating functioncall eval()--><td><input type="button"value="="onclick="solve()"/> </td></tr></table></body>

Adding Flavours of CSS

1. The title element is optional, play with it
2. The border radius is kept at 10px to give round corners to the elements. The width should be kept at 100% to cover the entire span.
3. The text-alignment is upto you, feel free.
4. The RGB colour code: #ff4456

<!-- forstyling --><style>.title{border-radius: 10px;margin-bottom: 10px;text-align:center;width: 210px;color:#ff4456;border: solid black 1px;}input[type="button"]{border-radius: 10px;background-color:#ff4456;color: black;border-color:#ff4456 ;width:100%;}input[type="text"]{border-radius: 10px;text-align: right;background-color:white;border-color: black ;width:100%}</style>

Conclusion

Before now, entire classes were devoted to learning how to compute certain equations, and students may not have been expected to actually learn what those equations were for and how they would use them in future careers.

Thanks to the scientific calculator and the different calculators available today, it’s become easier to perform a variety of functions and see how they are likely to impact a career in the sciences or mathematics.