To design a web application for a standard calculator.
Validate the HTML and CSS code.
Publish the website in the given URL.
<!DOCTYPE html>
<html>
<head>
<title>SEC Demo on Calculator</title>
<style type="text/css">
table{
border: 1px solid black;
margin-left: auto;
margin-right: auto;
}
input[type="text"]{
border: 1px solid black;
padding: 20px 30px;
font-size: 24px;
font-weight: bold;
border-radius: 2px;
}
input[type="button"]{
width: 100%;
padding: 20px 40px;
background-color:greenyellow;
border-radius: 2px;
}
</style>
</head>
<body>
<form name="form1" onload="result.value=''">
<h1 style="text-align: center;color:blue;">Simple Calculator</h1>
<table id="calc">
<tr>
<td colspan="4">
<input type="text" id="result">
</td>
</tr>
<tr>
<td><input type="button" value="1" onclick="result.value+='1'"/></td>
<td><input type="button" value="2" onclick="result.value+='2'"/></td>
<td><input type="button" value="3" onclick="result.value+='3'"/></td>
<td><input type="button" value="+" onclick="result.value+='+'"/></td>
</tr>
<tr>
<td><input type="button" value="4" onclick="result.value+='4'"/></td>
<td><input type="button" value="5" onclick="result.value+='5'"/></td>
<td><input type="button" value="6" onclick="result.value+='6'"/></td>
<td><input type="button" value="-" onclick="result.value+='-'"/></td>
</tr>
<tr>
<td><input type="button" value="7" onclick="result.value+='7'"/></td>
<td><input type="button" value="8" onclick="result.value+='8'"/></td>
<td><input type="button" value="9" onclick="result.value+='9'"/></td>
<td><input type="button" value="*" onclick="result.value+='*'"/></td>
</tr>
<tr>
<td><input type="button" value="/" onclick="result.value+='/'"/></td>
<td><input type="button" value="0" onclick="result.value+='0'"/></td>
<td><input type="button" value="." onclick="result.value+='.'"/></td>
<td><input type="button" value="="
onclick="result.value=eval(result.value)"/></td>
</tr>
<tr>
<td colspan="4">
<input type="button" value="clearall" id="clear"
onclick="result.value=''">
</td>
</tr>
</table>
</form>
the program is successfuly exicuted
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