Calculator App
About this app
A simple calculator app that performs basic arithmetic operations.
Calculator App Calculator 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>Calculator App</title>
<meta name="description" content="A simple calculator app that performs basic arithmetic operations.">
<meta name="keywords" content="calculator, arithmetic, math, calculate">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<script type="text/javascript">
try {
// App Javascript Goes Here. Place your entire script content inside the try block for error handling.
// This will run when the DOM is ready.
document.addEventListener("DOMContentLoaded", function() {
var display = document.getElementById("display");
var buttons = document.getElementsByClassName("btn");
// Add click event listener to each button
for (var i = 0; i < buttons.length; i++) {
buttons[i].addEventListener("click", function() {
var buttonValue = this.innerHTML;
if (buttonValue === "=") {
// Evaluate the expression and display the result
display.value = eval(display.value);
} else if (buttonValue === "C") {
// Clear the display
display.value = "";
} else {
// Append the button value to the display
display.value += buttonValue;
}
});
}
});
} catch (error) {
// This will throw the error to the parent window.
throw error;
}
</script>
<style>
/* App CSS Goes Here */
body {
background-color: #f5f5f5;
font-family: 'Roboto', sans-serif;
}
#main-container {
max-width: 400px;
margin: 0 auto;
padding: 20px;
background-color: #ffffff;
border-radius: 10px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
h1 {
text-align: center;
margin-bottom: 20px;
color: #333333;
}
#display {
width: 100%;
padding: 10px;
margin-bottom: 20px;
font-size: 20px;
border: none;
border-radius: 5px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.btn {
width: 50px;
height: 50px;
margin: 5px;
font-size: 20px;
border: none;
border-radius: 5px;
background-color: #3498db;
color: #ffffff;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
transition: background-color 0.3s;
}
.btn:hover {
background-color: #2980b9;
}
</style>
</head>
<body>
<div id="main-container" class="container">
<h1>Calculator</h1>
<input type="text" id="display" readonly>
<div>
<button class="btn">7</button>
<button class="btn">8</button>
<button class="btn">9</button>
<button class="btn">/</button>
</div>
<div>
<button class="btn">4</button>
<button class="btn">5</button>
<button class="btn">6</button>
<button class="btn">*</button>
</div>
<div>
<button class="btn">1</button>
<button class="btn">2</button>
<button class="btn">3</button>
<button class="btn">-</button>
</div>
<div>
<button class="btn">0</button>
<button class="btn">.</button>
<button class="btn">C</button>
<button class="btn">+</button>
</div>
<div>
<button class="btn" style="width: 100px;">=</button>
</div>
</div>
</body>
</html>
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