Javascript Scientific Calculator / JavaScript Calculator

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Javascript Scientific Calculator / JavaScript Calculator

JavaScript Scientific Calculator: A Comprehensive Guide

Calculators have been used for centuries to solve mathematical problems, from the simple to the complex. The evolution of technology has led to the development of more advanced calculators, including scientific calculators that can perform complex functions.
In this article, we will explore the world of scientific calculators and focus on building a JavaScript scientific calculator. We will also review some of the popular scientific calculator resources available, including W3Schools, GitHub, CodePen, and more.

Why JavaScript?

JavaScript is a popular programming language used for building web applications. It is a client-side language, meaning that it runs in the user’s browser. One of the main advantages of using JavaScript to build a scientific calculator is that it can be easily integrated into a website. Additionally, JavaScript allows for real-time calculations and provides users with a more interactive experience.

JavaScript Scientific Calculator: Getting Started

To begin building a JavaScript scientific calculator, we will need to have a basic understanding of HTML, CSS, and JavaScript. We will also need to have a code editor installed on our computer, such as Visual Studio Code or Atom.
The first step in building a JavaScript scientific calculator is to create the HTML structure. We will create a simple layout for our calculator using HTML and CSS. Here is an example of what our HTML code will look like:
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<!DOCTYPE html>
      <title>JavaScript Scientific Calculator</title>
      <link rel=”stylesheet” href=”style.css”>
      <div class=”calculator”>
         <input type=”text” id=”result” readonly>
         <button onclick=”clearResult()”>C</button>
         <button onclick=”getResult()”>=</button>
         <button onclick=”addNumber(1)”>1</button>
         <button onclick=”addNumber(2)”>2</button>
         <button onclick=”addNumber(3)”>3</button>
         <button onclick=”addNumber(‘+’)”>+</button>
         <button onclick=”addNumber(‘-‘)”>-</button>
         <button onclick=”addNumber(‘*’)”>*</button>
         <button onclick=”addNumber(‘/’)”>/</button>
         <button onclick=”addNumber(‘.’)”>.</button>
         <button onclick=”addNumber(0)”>0</button>
      <script src=”script.js”></script>
In this code, we have created a basic structure for our calculator. We have added an input field to display the result, along with buttons for each number and operation.
Next, we will create a CSS file to style our calculator. Here is an example of what our CSS code will look like:
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.calculator {
   margin: 0 auto;
   width: 200px;
   padding: 10px;
   background-color: #f2f2f2;
   border-radius: 5px;
   text-align: center;
input[type=”text”] {
   width: 100%;
   height: 40px;
   margin-bottom: 10px;
   font-size: 20px;
   text-align: right;
   border-radius: 5px;
   border: none;
   background-color: #e6e6e6;
button {
   width: 50px;
   height: 50px;
   font-size: 20px;
   border-radius: 5px;
   border: none;
   margin-right: 5px;
   margin-bottom: 5px;
   background-color: #4d4d4d;
   color: #fff;
   cursor: pointer;
button:hover {
   background-color: #666666;
In this CSS code, we have styled our calculator by giving it a specific width, padding, and background color. We have also added styles for the input field and buttons, including font size, text alignment, and background color.

JavaScript Scientific Calculator: Building the Functionality

Now that we have created the HTML and CSS for our calculator, we can move on to the JavaScript code. We will use JavaScript to perform the calculations and display the result in the input field.
Here is an example of what our JavaScript code will look like:


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function addNumber(number) {
   var result = document.getElementById(“result”);
   result.value += number;
function clearResult() {
   var result = document.getElementById(“result”);
   result.value = “”;
function getResult() {
   var result = document.getElementById(“result”);
   result.value = eval(result.value);
In this code, we have made three capabilities: addNumber(), clearResult(), and getResult(). The addNumber() capability adds the chose number or activity to the information field, while the clearResult() capability clears the information field. The getResult() capability assesses the numerical articulation entered in the information field and shows the outcome.
We can now save our JavaScript code in a file called script.js and link it to our HTML file using the <script> tag.

JavaScript Scientific Calculator: Advanced Functionality

Our basic JavaScript scientific calculator is now functional, but we can add more advanced functionality to make it more useful.
For example, we can add trigonometric functions such as sine, cosine, and tangent. Here is an example of how we can add the sine function to our calculator:


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function getSin() {
   var result = document.getElementById(“result”);
   result.value = Math.sin(result.value);
In this code, we have made another capability called getSin() that works out the sine of the worth in the information field utilizing the Math.sin() technique.
We can likewise add other high level capabilities like logarithms, types, and square roots. Here is an illustration of how we can add the square root capability to our mini-computer:
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function getSquareRoot() {
   var result = document.getElementById(“result”);
   result.value = Math.sqrt(result.value);
In this code, we have created a new function called getSquareRoot() that calculates the square root of the value in the input field using the Math.sqrt() method.

JavaScript Scientific Calculator: Resources

If you are interested in learning more about building a JavaScript scientific calculator, there are several resources available online.
W3Schools offers a comprehensive tutorial on building a JavaScript calculator, which includes a section on adding scientific functionality.
GitHub also has several open-source JavaScript scientific calculator projects, which you can use as a starting point for building your own calculator.
CodePen is a site that permits you to investigate and share code scraps, including JavaScript logical mini-computers.
At long last, in the event that you are know about other programming dialects, for example, C++, you can find logical mini-computer code models online that you can use as a source of perspective for building a JavaScript logical number cruncher.


All in all, fabricating a JavaScript logical number cruncher is a tomfoolery and compensating project for those keen on web improvement and science. By utilizing HTML, CSS, and JavaScript, you can make a completely practical logical mini-computer that can carry out complex numerical roles. With the assets accessible web based, including instructional exercises, open-source tasks, and code models, fabricating a JavaScript logical number cruncher has never been more straightforward.

I'm a professional expert in Web and Graphic Designing. I've worked as a graphic designer for 3 years. That's why I have learned all the designing techniques to create a visual concept that certainly is the medium of communication with consumers, clients, sponsors, etc.

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