A calculator is an essential tool for anyone who needs to perform arithmetic calculations quickly and accurately.
While there are plenty of calculators available for purchase,
it can be a fun and rewarding experience to build your own calculator.
In this article,
we will go through the steps involved in building a basic calculator using a programming language.
Please copy below this code and past to your website or apk
<!DOCTYPE html>
<html>
<head>
<title>Calculator</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
background-color: #f2f2f2;
}
.calculator {
max-width: 400px;
margin: 20px auto;
padding: 20px;
background-color: #fff;
box-shadow: 0px 0px 10px #aaa;
border-radius: 5px;
text-align: center;
}
input[type="button"] {
width: 50px;
height: 50px;
font-size: 20px;
margin: 5px;
border: none;
background-color: #f2f2f2;
box-shadow: 0px 0px 3px #aaa;
border-radius: 5px;
cursor: pointer;
}
input[type="text"] {
width: 100%;
height: 50px;
font-size: 20px;
text-align: right;
margin-bottom: 10px;
border: none;
background-color: #f2f2f2;
box-shadow: 0px 0px 3px #aaa;
border-radius: 5px;
padding-right: 10px;
overflow: hidden;
text-overflow: ellipsis;
}
</style>
</head>
<body>
<div class="calculator">
<input type="text" id="display" disabled>
<input type="button" value="C" onclick="clearDisplay()">
<input type="button" value="/" onclick="updateDisplay('/')">
<input type="button" value="*" onclick="updateDisplay('*')">
<input type="button" value="7" onclick="updateDisplay('7')">
<input type="button" value="8" onclick="updateDisplay('8')">
<input type="button" value="9" onclick="updateDisplay('9')">
<input type="button" value="-" onclick="updateDisplay('-')">
<input type="button" value="4" onclick="updateDisplay('4')">
<input type="button" value="5" onclick="updateDisplay('5')">
<input type="button" value="6" onclick="updateDisplay('6')">
<input type="button" value="+" onclick="updateDisplay('+')">
<input type="button" value="1" onclick="updateDisplay('1')">
<input type="button" value="2" onclick="updateDisplay('2')">
<input type="button" value="3" onclick="updateDisplay('3')">
<input type="button" value="=" onclick="calculate()">
</div>
<script>
let input = '';
let display = document.getElementById('display');
function updateDisplay(value) {
input += value;
display.value = input;
}
function calculate() {
try {
input = eval(input);
display.value = input;
} catch (error) {
alert('Invalid input');
}
}
function clearDisplay() {
input = '';
display.value = '';
}
</script>
</body>
</html>
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