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Write a javascript program to make a simple calculator
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Answer Posted / ruchi goswami
<html>
<head>
<link rel="stylesheet" type="text/css" href="css2.css">
<title> calculator </title>
</head>
<body>
<div id="wrap">
<h1> Calculator </h1>
<b> enter first number </b>
                   
<b> enter second number </b>
<form action="">
<input type="text" name="firstnum" id="first">
                   
<input type="text" name="lastnum" id="second">
</form>
<br> </br>
<button onclick="sum()"> + </button>
               
<button onclick="sub()"> - </button>
               
<button onclick="mul()"> * </button>
               
<button onclick="divi()"> / </button>
<br> </br>
<input type="text" id="result">
<p id="demo"></p>
<script>
function sum()
{
var a = Number(document.getElementById("first").value);
var b = Number(document.getElementById("second").value);
c = a+b;
document.getElementById("result").value = c;
}
function sub()
{
var a = Number(document.getElementById("first").value);
var b = Number(document.getElementById("second").value);
c = a-b;
document.getElementById("result").value = c;
}
function mul()
{
var a = Number(document.getElementById("first").value);
var b = Number(document.getElementById("second").value);
c = a*b;
document.getElementById("result").value = c;
}
function divi()
{
var a = Number(document.getElementById("first").value);
var b = Number(document.getElementById("second").value);
c = a/b;
document.getElementById("result").value = c;
}
</script>
</div>
</body>
</html>
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