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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
input[type="button" ]{
font-size: 50px;
padding: 30px;
}
input[type="text"]{
font-size: 50px;
}
#clear{
width: 500px;
}
#clear{
background-color: red;
}
#clear:hover{
color:white;
}
input[type="button"]:hover{
background-color: rgba(43, 240, 17, 0.712);
cursor: pointer;
}
input[type="button"]{
background-color: beige;
border-radius: 30px;
}
.cacu{
border: 2px solid rgb(0, 0, 0);
text-align: center;
width: 45%;
margin-top: 5%;
position: relative;
left: 36%;
background-color: rgba(54, 200, 219, 0.61)
}
h1{
text-align: center;
font-size: 50px;
color: brown;
}
</style>
</head>
<body>
<h1>CALCULATOR </h1>
<div class="cacu">
<table>
<tr>
<th colspan="4"><input type="text" name="" id="space"></th>
</tr>
<th><input id="btn0" type="button" value="0" onclick="display(0)" ></th>
<th><input type="button" value="B" onclick="backSpace()"></th>
<th><input type="button" value="." onclick="display('.')"></th>
<th><input type="button" value="+" onclick="display('+')"></th>
<tr>
<th><input type="button" value="1" onclick="display(1)"></th>
<th><input type="button" value="2" onclick="display(2)"></th>
<th><input type="button" value="3" onclick="display(3)"></th>
<th><input type="button" value="-" onclick="display('-')"></th>
</tr>
<tr>
<th><input type="button" value="4" onclick="display(4)"></th>
<th><input type="button" value="5" onclick="display(5)"></th>
<th><input type="button" value="6" onclick="display(6)"></th>
<th><input type="button" value="*" onclick="display('*')"></th>
</tr>
<tr>
<th><input type="button" value="7" onclick="display(7)"></th>
<th><input type="button" value="8" onclick="display(8)"></th>
<th><input type="button" value="9" onclick="display(9)"></th>
<th><input type="button" value="/" onclick="display('/')"></th>
</tr>
<tr>
<th colspan="3"><input id="clear" type="button" value="clear All" onclick="clear1()"></th>
<th><input type="button" value="=" onclick="call1()"></th>
</tr>
</table>
</div>
<script>
let x,y;
function display(val){
document.getElementById('space').value+=val;
}
function clear1(){
document.getElementById('space').value="";
}
function call1(){
x=document.getElementById('space').value;
y=eval(x);
document.getElementById('space').value=y;
}
let back1,r,l;
function backSpace(){
back1=document.getElementById("space").value;
l= back1.length;
r=back1.substring(0,l-1);
document.getElementById("space").value=r;
}
</script>
</body>
</html>