Simple calculator
<!--Code to create a Simple calculator using Html,css,js-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Simple Calculator</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f0f0f0;
font-family: Arial, sans-serif;
}
.calculator {
background-color: #fff;
padding: 20px;
border-radius: 15px;
box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
#result {
width: 100%;
height: 50px;
font-size: 24px;
text-align: right;
margin-bottom: 10px;
padding: 10px;
border: 1px solid #ccc;
border-radius: 10px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 60px);
gap: 10px;
}
button {
padding: 15px;
font-size: 18px;
border: none;
border-radius: 10px;
background-color: #eee;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #ccc;
}
.operator {
background-color: #f9c74f;
}
.equals {
background-color: #90be6d;
grid-column: span 2;
}
.clear {
background-color: #f94144;
color: white;
}
.delete {
background-color: #577590;
color: white;
}
<button onclick="append('7')">7</button>
<button onclick="append('8')">8</button>
<button onclick="append('9')">9</button>
<button class="operator" onclick="append('*')">*</button>
<button onclick="append('4')">4</button>
<button onclick="append('5')">5</button>
<button onclick="append('6')">6</button>
<button class="operator" onclick="append('-')">-</button>
<button onclick="append('1')">1</button>
<button onclick="append('2')">2</button>
<button onclick="append('3')">3</button>
<button class="operator" onclick="append('+')">+</button>
<button onclick="append('0')">0</button>
<button onclick="append('.')">.</button>
<button class="equals" onclick="calculate()">=</button>