js run a program (like calculator) code example
Example 1: a simple javascript calculator
<div class="calculator">
<input type="text" class="calculator-screen" value="" disabled />
<div class="calculator-keys">
<button type="button" class="operator" value="+">+</button>
<button type="button" class="operator" value="-">-</button>
<button type="button" class="operator" value="*">×</button>
<button type="button" class="operator" value="/">÷</button>
<button type="button" value="7">7</button>
<button type="button" value="8">8</button>
<button type="button" value="9">9</button>
<button type="button" value="4">4</button>
<button type="button" value="5">5</button>
<button type="button" value="6">6</button>
<button type="button" value="1">1</button>
<button type="button" value="2">2</button>
<button type="button" value="3">3</button>
<button type="button" value="0">0</button>
<button type="button" class="decimal" value=".">.</button>
<button type="button" class="all-clear" value="all-clear">AC</button>
<button type="button" class="equal-sign operator" value="=">=</button>
</div>
</div>
Example 2: What is the code for a calculator
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Calculator Made by Sanjith </title>
<link href="https://fonts.googleapis.com/css?family=Inconsolata" rel="stylesheet">
<style>
* {
font-family: 'Inconsolata', monospace;
color: rgb(0, 0, 0);
}
body {
background: linear-gradient(to right, rgb(24, 184, 168), rgb(118, 190, 50));;
}
.container {
width: 320px;
background: linear-gradient(to right, rgb(173, 58, 173), rgb(184, 63, 26));;
margin: 120px auto;
}
table {
width: 100%;
border-color: #09646407;
background: linear-gradient(to right, rgb(184, 24, 37), rgb(78, 13, 230));;
}
td {
width: 25%;
border-color: rgba(0, 0, 0, 0.363);
}
button {
width: 100%;
height: 70px;
font-size: 24px;
background: linear-gradient(to right, rgb(151, 11, 151), rgb(190, 94, 50));;
border: none;
}
#inputLabel {
height: 120px;
font-size: 40px;
vertical-align: bottom;
text-align: right;
padding-right: 16px;
background: linear-gradient(to right, rgb(4, 65, 88), rgb(226, 68, 47));;
}
</style>
</head>
<body>
<div class="container">
<table border="1" cellspacing="0">
<tr>
<td colspan="4" id="inputLabel">0</td>
</tr>
<tr>
<td colspan="3"><button onclick="pushBtn(this);">AC</button></td>
<td><button onclick="pushBtn(this);">/</button></td>
</tr>
<tr>
<td><button onclick="pushBtn(this);">7</button></td>
<td><button onclick="pushBtn(this);">8</button></td>
<td><button onclick="pushBtn(this);">9</button></td>
<td><button onclick="pushBtn(this);">*</button></td>
</tr>
<tr>
<td><button onclick="pushBtn(this);">4</button></td>
<td><button onclick="pushBtn(this);">5</button></td>
<td><button onclick="pushBtn(this);">6</button></td>
<td><button onclick="pushBtn(this);">-</button></td>
</tr>
<tr>
<td><button onclick="pushBtn(this);">1</button></td>
<td><button onclick="pushBtn(this);">2</button></td>
<td><button onclick="pushBtn(this);">3</button></td>
<td><button onclick="pushBtn(this);">+</button></td>
</tr>
<tr>
<td colspan="2"><button onclick="pushBtn(this);">0</button></td>
<td><button onclick="pushBtn(this);">.</button></td>
<td><button onclick="pushBtn(this);">=</button></td>
</tr>
</table>
</div>
<script>
var inputLabel = document.getElementById('inputLabel');
function pushBtn(obj) {
var pushed = obj.innerHTML;
if (pushed == '=') {
inputLabel.innerHTML = eval(inputLabel.innerHTML);
} else if (pushed == 'AC') {
inputLabel.innerHTML = '0';
} else {
if (inputLabel.innerHTML == '0') {
inputLabel.innerHTML = pushed;
} else {
inputLabel.innerHTML += pushed;
}
}
}
</script>
</body>
</html>