Calculator App
About this app
A simple calculator app for basic arithmetic calculations.
Calculator App 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 for basic arithmetic calculations.">
<meta name="keywords" content="calculator, arithmetic, calculations">
<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");
var operators = ["+", "-", "*", "/"];
// Add click event listeners to all buttons
for (var i = 0; i < buttons.length; i++) {
buttons[i].addEventListener("click", function() {
var value = this.getAttribute("data-value");
if (value === "=") {
try {
display.value = eval(display.value);
} catch (error) {
display.value = "Error";
}
} else if (value === "C") {
display.value = "";
} else {
display.value += value;
}
});
}
});
} catch (error) {
// This will throw the error to the parent window.
throw error;
}
</script>
<style>
/* App CSS Goes Here */
body {
background-color: #f8f9fa;
font-family: 'Roboto', sans-serif;
}
.container {
max-width: 300px;
margin: 50px auto;
background-color: #fff;
border-radius: 5px;
padding: 20px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.display {
width: 100%;
padding: 10px;
margin-bottom: 10px;
font-size: 20px;
text-align: right;
border: none;
border-radius: 5px;
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}
.btn {
width: 50px;
height: 50px;
font-size: 20px;
text-align: center;
line-height: 50px;
border-radius: 50%;
background-color: #e9ecef;
border: none;
cursor: pointer;
transition: background-color 0.3s ease;
}
.btn:hover {
background-color: #dee2e6;
}
.btn.operator {
background-color: #007bff;
color: #fff;
}
.btn.operator:hover {
background-color: #0069d9;
}
</style>
</head>
<body>
<div id="main-container" class="container">
<input id="display" class="display" type="text" readonly>
<div class="row">
<div class="col-3"><button class="btn" data-value="7">7</button></div>
<div class="col-3"><button class="btn" data-value="8">8</button></div>
<div class="col-3"><button class="btn" data-value="9">9</button></div>
<div class="col-3"><button class="btn operator" data-value="/">/</button></div>
</div>
<div class="row">
<div class="col-3"><button class="btn" data-value="4">4</button></div>
<div class="col-3"><button class="btn" data-value="5">5</button></div>
<div class="col-3"><button class="btn" data-value="6">6</button></div>
<div class="col-3"><button class="btn operator" data-value="*">*</button></div>
</div>
<div class="row">
<div class="col-3"><button class="btn" data-value="1">1</button></div>
<div class="col-3"><button class="btn" data-value="2">2</button></div>
<div class="col-3"><button class="btn" data-value="3">3</button></div>
<div class="col-3"><button class="btn operator" data-value="-">-</button></div>
</div>
<div class="row">
<div class="col-3"><button class="btn" data-value="0">0</button></div>
<div class="col-3"><button class="btn" data-value=".">.</button></div>
<div class="col-3"><button class="btn" data-value="C">C</button></div>
<div class="col-3"><button class="btn operator" data-value="+">+</button></div>
</div>
<div class="row">
<div class="col-12"><button class="btn operator" data-value="=">=</button></div>
</div>
</div>
</body>
</html>
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