my first cal Sure! Here's a simple calculator using HTML, CSS, and JavaScript:
<!DOCTYPE html>
<html>
<head>
<title>Simple Calculator</title>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div class="calculator">
<input type="text" id="display" disabled>
<div class="buttons">
<button onclick="appendNumber('1')">1</button>
<button onclick="appendNumber('2')">2</button>
<button onclick="appendNumber('3')">3</button>
<button onclick="appendOperator('+')">+</button>
<button onclick="appendNumber('4')">4</button>
<button onclick="appendNumber('5')">5</button>
<button onclick="appendNumber('6')">6</button>
<button onclick="appendOperator('-')">-</button>
<button onclick="appendNumber('7')">7</button>
<button onclick="appendNumber('8')">8</button>
<button onclick="appendNumber('9')">9</button>
<button onclick="appendOperator('*')">*</button>
<button onclick="appendNumber('0')">0</button>
<button onclick="appendOperator('.')">.</button>
<button onclick="calculate()">=</button>
<button onclick="appendOperator('/')">/</button>
<button onclick="clearDisplay()">C</button>
</div>
</div>
<script src="script.js"></script>
</body>
</html>/* styles.css */
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #f0f0f0;
}
.calculator {
background-color: #fff;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
padding: 20px;
width: 200px;
}
#display {
width: 100%;
height: 40px;
margin-bottom: 10px;
text-align: right;
padding: 10px;
font-size: 1.2em;
border: 1px solid #ccc;
border-radius: 5px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
button {
font-size: 1.2em;
padding: 10px;
border: none;
border-radius: 5px;
cursor: pointer;
background-color: #f9f9f9;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}
button:hover {
background-color: #e0e0e0;
}// script.js
let display = document.getElementById('display');
let currentInput = '';
function appendNumber(number) {
currentInput += number;
display.value = currentInput;
}
function appendOperator(operator) {
currentInput += ' ' + operator + ' ';
display.value = currentInput;
}
function calculate() {
try {
currentInput = eval(currentInput).toString();
display.value = currentInput;
} catch (e) {
display.value = 'Error';
}
}
function clearDisplay() {
currentInput = '';
display.value = '';
}- HTML: Defines the structure of the calculator with a display input and buttons for numbers and operators.
- CSS: Styles the calculator, making it visually appealing with a centered layout, grid for buttons, and hover effects.
- JavaScript: Handles the calculator logic, updating the display, appending numbers/operators, evaluating expressions, and clearing the display.
To test this, save the HTML, CSS, and JavaScript code in corresponding files (index.html, styles.css, script.js) and open the index.html file in a web browser.