Build a Simple Calculator in HTML with ChatGPT: Step-by-Step Tutorial
Creating a
simple calculator using only HTML is an excellent project for beginners who
want to understand the basics of web development. In this step-by-step guide,
you'll learn how to build a functional calculator with just HTML. Let’s get
started!
Step 1:
Set Up Your Project
1. Create a Folder: Create a new folder on your computer to store the project
files. Name it something like `SimpleCalculator`.
2. Create File: Inside the folder, create a file named:
- `index.html`
Step
2: Build the HTML Structure
The HTML
file provides the structure for the calculator. Open `index.html` in your text
editor and add the following code:
html
<!DOCTYPE
html>
<html
lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,
initial-scale=1.0">
<title>Simple
Calculator</title>
</head>
<body>
<div>
<table border="1"
align="center">
<tr>
<td
colspan="4"><input type="text" id="result"
style="width: 100%;" disabled></td>
</tr>
<tr>
<td><button
onclick="appendValue('7')">7</button></td>
<td><button
onclick="appendValue('8')">8</button></td>
<td><button
onclick="appendValue('9')">9</button></td>
<td><button
onclick="appendValue('/')">/</button></td>
</tr>
<tr>
<td><button
onclick="appendValue('4')">4</button></td>
<td><button
onclick="appendValue('5')">5</button></td>
<td><button
onclick="appendValue('6')">6</button></td>
<td><button
onclick="appendValue('*')">*</button></td>
</tr>
<tr>
<td><button
onclick="appendValue('1')">1</button></td>
<td><button
onclick="appendValue('2')">2</button></td>
<td><button
onclick="appendValue('3')">3</button></td>
<td><button
onclick="appendValue('-')">-</button></td>
</tr>
<tr>
<td><button
onclick="appendValue('0')">0</button></td>
<td><button
onclick="appendValue('.')">.</button></td>
<td><button
onclick="clearResult()">C</button></td>
<td><button
onclick="appendValue('+')">+</button></td>
</tr>
<tr>
<td
colspan="4"><button onclick="calculateResult()"
style="width: 100%;">=</button></td>
</tr>
</table>
</div>
<script>
let resultField =
document.getElementById('result');
function appendValue(value) {
resultField.value += value;
}
function clearResult() {
resultField.value = '';
}
function calculateResult() {
try {
resultField.value =
eval(resultField.value);
} catch (error) {
alert('Invalid Input');
clearResult();
}
}
</script>
</body>
</html>
Explanation:
- The
`<input>` element is used to display the calculation results.
- Buttons
are arranged using a simple HTML table to simulate a calculator layout.
- The
script section contains inline JavaScript to handle the functionality of the
calculator.
Step 3: Test Your Calculator
1. Open
the `index.html` file in your web browser.
2. Try
clicking the buttons to perform calculations.
3. Verify
the calculator functions as expected.
Comments
Post a Comment