Hey, I am Ajink, and today in this blog, we’re going to create a simple yet functional calculator using HTML, CSS, and JavaScript. This calculator will perform basic arithmetic operations, providing a user-friendly interface for mathematical calculations.
HTML Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>Simple Calculator</title>
</head>
<body>
<div class="calculator-container">
<input type="text" id="display" readonly>
<div class="buttons">
<button onclick="clearDisplay()">C</button>
<button onclick="appendToDisplay('7')">7</button>
<button onclick="appendToDisplay('8')">8</button>
<button onclick="appendToDisplay('9')">9</button>
<button onclick="appendToDisplay('/')">/</button>
<button onclick="appendToDisplay('4')">4</button>
<button onclick="appendToDisplay('5')">5</button>
<button onclick="appendToDisplay('6')">6</button>
<button onclick="appendToDisplay('*')">*</button>
<button onclick="appendToDisplay('1')">1</button>
<button onclick="appendToDisplay('2')">2</button>
<button onclick="appendToDisplay('3')">3</button>
<button onclick="appendToDisplay('-')">-</button>
<button onclick="appendToDisplay('0')">0</button>
<button onclick="appendToDisplay('.')">.</button>
<button onclick="calculateResult()">=</button>
<button onclick="appendToDisplay('+')">+</button>
</div>
</div>
<script src="app.js"></script>
</body>
</html>
HTML Code Explanation:
- The HTML structure includes an input field for displaying the calculator’s input and result, and a set of buttons for digits, operators, and actions.
CSS Code:
body {
margin: 0;
font-family: 'Arial', sans-serif;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
background-color: #f0f0f0;
}
.calculator-container {
background-color: #fff;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
border-radius: 8px;
padding: 20px;
text-align: center;
}
#display {
width: 100%;
padding: 10px;
margin-bottom: 10px;
font-size: 20px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
button {
padding: 10px;
font-size: 18px;
cursor: pointer;
border: none;
border-radius: 4px;
background-color: #3498db;
color: #fff;
}
CSS Code Explanation:
- The CSS provides styling for the calculator container, display input field, and buttons.
JavaScript Code:
let display = document.getElementById('display');
function appendToDisplay(value) {
display.value += value;
}
function clearDisplay() {
display.value = '';
}
function calculateResult() {
try {
display.value = eval(display.value);
} catch (error) {
display.value = 'Error';
}
}
JavaScript Code Explanation:
- The JavaScript code defines functions for appending values to the display, clearing the display, and calculating the result using the
evalfunction. - Error handling is included to display “Error” in case of invalid calculations.
Conclusion:
In this blog, we successfully built a simple calculator using HTML, CSS, and JavaScript. Users can perform basic arithmetic operations with a user-friendly interface. Don’t forget to subscribe to my YouTube channel at youtube.com/@ajink21 for more exciting tutorials.
Thanks for reading, and if you have any doubts, feel free to comment!
