If you are learning web development and want to build a simple yet useful project, this Add Two Numbers Tool is a perfect choice.
It uses HTML, CSS, and JavaScript to perform instant calculation with a clean and modern UI.
In this guide, you will get full source code and explanation.
📌 What is Add Two Numbers Tool?
This tool allows users to:
Enter two numbers
Click a button
Instantly get the sum
It is a basic project to understand user input and JavaScript functions.
💻 How This Tool Works
The logic is simple:
num1 + num2
The tool takes values from input fields and displays the result instantly.
🧩 Complete HTML CSS JavaScript Source Code
Copy and save this file as:
index.html
<!DOCTYPE html>
<html>
<head>
<title>Add Two Numbers Tool</title>
<style>
body {
font-family: Arial;
background: linear-gradient(135deg, #36d1dc, #5b86e5);
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
.container {
background: #ffffff;
padding: 30px;
border-radius: 15px;
text-align: center;
width: 320px;
box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
h2 {
margin-bottom: 15px;
}
input {
width: 90%;
padding: 10px;
margin: 10px 0;
border-radius: 8px;
border: 1px solid #ccc;
}
button {
padding: 10px 20px;
background: #5b86e5;
color: white;
border: none;
border-radius: 8px;
cursor: pointer;
}
button:hover {
background: #3f6fd1;
}
#result {
margin-top: 15px;
font-size: 18px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="container">
<h2>Add Two Numbers</h2>
<input type="number" id="num1" placeholder="Enter first number">
<input type="number" id="num2" placeholder="Enter second number">
<button onclick="addNumbers()">Calculate</button>
<div id="result"></div>
</div>
<script>
function addNumbers() {
let n1 = document.getElementById("num1").value;
let n2 = document.getElementById("num2").value;
if (n1 === "" || n2 === "") {
document.getElementById("result").innerHTML = "Please enter both numbers.";
return;
}
let sum = parseFloat(n1) + parseFloat(n2);
document.getElementById("result").innerHTML = "Result: " + sum;
}
</script>
</body>
</html>
🚀 Features of This Tool
Clean and modern UI
Instant calculation
Beginner-friendly project
Responsive design
No external libraries required
📥 How to Use / Download Source Code
Copy the above code
Open Notepad
Paste the code
Click Save As
File name:
index.htmlOpen in browser
Your tool is ready.
🎯 Who Can Use This Project?
Beginner web developers
Students learning JavaScript
Coding practice learners
Teachers for demonstration
📝 Final Words
The Add Two Numbers Tool is a simple but powerful beginner project. It helps you understand input handling, functions, and UI design in web development.
You can improve it by adding animations, sound, or advanced calculations.
For more coding tools and source codes, visit EasySolveGuide.
❓ Frequently Asked Questions
Q1. Can I add more operations like subtraction or multiplication?
Yes, you can easily extend the code.
Q2. Does this tool work offline?
Yes, it runs directly in your browser.
Q3. Is this project beginner-friendly?
Yes, it is perfect for beginners.
