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Prime Number
Description
Enter a number and JavaScript can instantly tell you if it is a prime number or not....View A Script Demo
Enter a number and JavaScript can instantly tell you if it is a prime number or not....View A Script Demo
Do you find it confusing setting up these script?
Java Scripts Magic can do all the hard work for you all At The Touch Of A Button.
Java Scripts Magic can do all the hard work for you all At The Touch Of A Button.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="TextPad 4.4">
<LINK href="general.css" rel="stylesheet" type="text/css">
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function calculate(form) {
var num=parseInt(form.number.value);
if (isNaN(num) || num < 0) {
form.result.value=(form.number.value + " is not a valid number! Try again!");
}
if (num == 1 || num == 2) {
form.result.value=(num + " is prime!");
}
for (var i=2;i<num;i++) {
if (num % i == 0) {
var prime="yes";
form.result.value=(num + " is not prime. It is divisible by " + i + ".");
break;
}
if (num % i != 0) var prime="no";
}
if (prime == "no") form.result.value=(num + " is prime!");
}
// End -->
</SCRIPT>
</HEAD>
<BODY Background=../graphics/grayback.jpg>
<center><BR><BR><BR>
<form name=form>
<h2>Prime Number Calculator</h2><p>
Please enter a number:<br>
<input type=text name=number size=7>
<input type=button value="Calculate" onClick="calculate(this.form)">
<P>
<input type=text name=result size=45 value="">
</form>
</center>
</BODY>
</HTML>
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="TextPad 4.4">
<LINK href="general.css" rel="stylesheet" type="text/css">
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function calculate(form) {
var num=parseInt(form.number.value);
if (isNaN(num) || num < 0) {
form.result.value=(form.number.value + " is not a valid number! Try again!");
}
if (num == 1 || num == 2) {
form.result.value=(num + " is prime!");
}
for (var i=2;i<num;i++) {
if (num % i == 0) {
var prime="yes";
form.result.value=(num + " is not prime. It is divisible by " + i + ".");
break;
}
if (num % i != 0) var prime="no";
}
if (prime == "no") form.result.value=(num + " is prime!");
}
// End -->
</SCRIPT>
</HEAD>
<BODY Background=../graphics/grayback.jpg>
<center><BR><BR><BR>
<form name=form>
<h2>Prime Number Calculator</h2><p>
Please enter a number:<br>
<input type=text name=number size=7>
<input type=button value="Calculate" onClick="calculate(this.form)">
<P>
<input type=text name=result size=45 value="">
</form>
</center>
</BODY>
</HTML>
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