A simple JavaScript program that I wrote that will ask the user to give two numbers and then it will compute the difference of the two numbers and display the result in the screen.
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Program Listing
index.htm
<html>
<title>Difference of Two Numbers in JavaScript</title>
<style type="text/css">
body {
font-family: arial;
font-weight: bold;
font-size:15px;
}
form
{
display: inline-block;
background-color: lightblue;
padding: 6px;
}
label{
display: block;
direction: rtl;
}
input{
direction: ltr;
}
label::after{
content: attr(data-text);
}
</style>
<script language="JavaScript">
function Solve(){
a = parseInt(document.difference.val_1.value);
b = parseInt(document.difference.val_2.value);
if (a > b) {
result = a - b;
} else {
result = b - a;
}
document.difference.diff.value = (result);
}
function Clear() {
document.difference.val_1.value ="";
document.difference.val_2.value="";
document.difference.diff.value="";
document.difference.val_1.focus();
}
</script>
<body>
<br>
<h3>Difference of Two Numbers in JavaScript</h3>
<form name="difference">
<label data-text="First Value">
<input type="text" name="val_1" autofocus required>
</label>
<br />
<label data-text="Second Value">
<input type="text" name="val_2"required="">
</label>
<br/>
<label data-text="Difference"> <input type="text" name="diff" >
</label>
<br /> <br>
<input type="button" value="Convert" title="Click here to solve." onclick="Solve()" />
<input type="button" value="Clear"
title="Click here to clear the text box."
onclick="Clear()"/>
</form>
</body>
</html>
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