USING HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Kodatechng Calculator</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="calculator">
<h2>JavaScript Calculator</h2>
<input type="text" id="display" readonly>
<div class="buttons">
<button onclick="clearDisplay()" class="clear">C</button>
<button onclick="deleteLast()">⌫</button>
<button onclick="appendValue('%')">%</button>
<button onclick="appendValue('/')">÷</button>
<button onclick="appendValue('7')">7</button>
<button onclick="appendValue('8')">8</button>
<button onclick="appendValue('9')">9</button>
<button onclick="appendValue('*')">×</button>
<button onclick="appendValue('4')">4</button>
<button onclick="appendValue('5')">5</button>
<button onclick="appendValue('6')">6</button>
<button onclick="appendValue('-')">−</button>
<button onclick="appendValue('1')">1</button>
<button onclick="appendValue('2')">2</button>
<button onclick="appendValue('3')">3</button>
<button onclick="appendValue('+')">+</button>
<button onclick="appendValue('0')">0</button>
<button onclick="appendValue('.')">.</button>
<button onclick="calculate()" class="equal">=</button>
</div>
</div>
<script src="script.js"></script>
</body>
</html>
USING CSS
*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial, sans-serif;
}
body{
background:#f0f4f8;
display:flex;
justify-content:center;
align-items:center;
height:100vh;
}
.calculator{
background:#ffffff;
padding:20px;
border-radius:12px;
box-shadow:0 5px 15px rgba(0,0,0,.2);
width:320px;
}
.calculator h2{
text-align:center;
margin-bottom:15px;
color:#333;
}
#display{
width:100%;
height:60px;
font-size:28px;
text-align:right;
padding:10px;
margin-bottom:15px;
border:2px solid #ddd;
border-radius:8px;
}
.buttons{
display:grid;
grid-template-columns:repeat(4,1fr);
gap:10px;
}
button{
height:60px;
font-size:22px;
border:none;
border-radius:8px;
cursor:pointer;
background:#3498db;
color:white;
transition:.3s;
}
button:hover{
background:#2980b9;
}
.clear{
background:#e74c3c;
}
.clear:hover{
background:#c0392b;
}
.equal{
background:#27ae60;
grid-column:span 2;
}
.equal:hover{
background:#1e8449;
}
SCRIPT.JS
const display = document.getElementById("display");
function appendValue(value){
display.value += value;
}
function clearDisplay(){
display.value = "";
}
function deleteLast(){
display.value = display.value.slice(0,-1);
}
function calculate(){
try{
display.value = eval(display.value);
}
catch(error){
alert("Invalid Calculation");
clearDisplay();
}
}
Tags
coding-tutorials