Advanced Calculator
About this app
An advanced calculator that performs addition, subtraction, multiplication, division, and square root operations.
Advanced Calculator 0 7 8 9 / 4 5 6 * 1 2 3 - 0 . √ + C =
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Source
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Advanced Calculator</title>
<meta name="description" content="An advanced calculator that performs addition, subtraction, multiplication, division, and square root operations."/>
<meta name="keywords" content="Calculator, Advanced Calculator, Math, Square Root, Arithmetic, Addition, Subtraction, Multiplication, Division"/>
<!-- Libraries -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.min.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.6.0/css/fontawesome.min.css" crossorigin="anonymous">
<script type="text/javascript">
try {
document.addEventListener("DOMContentLoaded", function() {
let currentInput = '';
let operator = '';
let previousInput = '';
function updateDisplay() {
document.getElementById('display').innerText = currentInput || '0';
}
function appendNumber(number) {
currentInput += number;
updateDisplay();
}
function setOperator(op) {
if (currentInput === '') return;
if (previousInput !== '' && currentInput !== '') {
currentInput = evaluate(previousInput, operator, currentInput).toString();
}
operator = op;
previousInput = currentInput;
currentInput = '';
updateDisplay();
}
function evaluate(a, op, b) {
switch (op) {
case '+': return parseFloat(a) + parseFloat(b);
case '-': return parseFloat(a) - parseFloat(b);
case '*': return parseFloat(a) * parseFloat(b);
case '/': return parseFloat(a) / parseFloat(b);
default: return b;
}
}
function calculateSquareRoot() {
if (currentInput !== '') {
currentInput = Math.sqrt(parseFloat(currentInput)).toString();
updateDisplay();
}
}
function clearAll() {
currentInput = '';
previousInput = '';
operator = '';
updateDisplay();
}
document.getElementById('buttons').addEventListener('click', function(e) {
if(e.target.classList.contains('number')) {
appendNumber(e.target.innerText);
} else if(e.target.classList.contains('operator')) {
setOperator(e.target.innerText);
} else if(e.target.id === 'equals') {
if (previousInput !== '' && currentInput !== '') {
currentInput = evaluate(previousInput, operator, currentInput).toString();
previousInput = '';
operator = '';
updateDisplay();
}
} else if(e.target.id === 'clear') {
clearAll();
} else if(e.target.id === 'sqrt') {
calculateSquareRoot();
}
});
updateDisplay();
});
} catch (error) {
throw error;
}
</script>
<style>
body {
background: linear-gradient(to right, #1e3c72, #2a569f);
color: white;
display: flex;
align-items: center;
height: 100vh;
justify-content: center;
font-family: Arial, sans-serif;
}
#main-container {
background: rgba(255, 255, 255, 0.2);
border-radius: 15px;
padding: 20px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
text-align: center;
}
#display {
font-size: 48px;
margin-bottom: 20px;
transition: all 0.3s;
}
#buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 15px;
}
.btn {
background-color: #56ccf2;
color: white;
padding: 20px;
border: none;
border-radius: 10px;
font-size: 24px;
cursor: pointer;
transition: background-color 0.3s ease;
}
.btn:hover {
background-color: #40a1d7;
}
.operator {
background-color: #ffc107;
}
.operator:hover {
background-color: #e0a800;
}
#clear {
background-color: #ff4757;
}
#clear:hover {
background-color: #ff6b81;
}
#sqrt {
background-color: #78e080;
}
#sqrt:hover {
background-color: #58c76d;
}
</style>
</head>
<body>
<div id="main-container">
<div id="display">0</div>
<div id="buttons">
<button class="btn number">7</button>
<button class="btn number">8</button>
<button class="btn number">9</button>
<button class="btn operator">/</button>
<button class="btn number">4</button>
<button class="btn number">5</button>
<button class="btn number">6</button>
<button class="btn operator">*</button>
<button class="btn number">1</button>
<button class="btn number">2</button>
<button class="btn number">3</button>
<button class="btn operator">-</button>
<button class="btn number">0</button>
<button class="btn primary">.</button>
<button class="btn" id="sqrt">√</button>
<button class="btn operator">+</button>
<button class="btn" id="clear">C</button>
<button class="btn" id="equals">=</button>
</div>
</div>
</body>
</html>
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