JavaScript Assignment

Prime Number Generator

Start
End
Prime Number
Source Code



<!doctype html>
<html>
	<head>
		<title>Prime Number Generator</title>
		<script>	
		function is_Prime(num)
		{
			if(num==1)
			{
				return false;
			}
			for(a=2;a<num;a++)
			{
				if(num%a==0)
				{
					return false;
				}
			}
			return true;
		}
		function genrate_prime()
		{
			var start,end,prime="";
			start=parseInt(document.getElementById("t1").value);
			end=parseInt(document.getElementById("t2").value);
			for(b=start;b<=end;b++)
			{
				if(is_Prime(b)==true)
				{
					prime=prime+b.toString()+",";
					//document.write(a);
				}
			}
			document.getElementById("ans").innerHTML=prime.substring(0,prime.length-1);;
		}
		</script>
	</head>
	<body>
		<h1 align="center">Mark-sheet Calculator using JavaScript</h1>
		<form name="frm1">
			<table border="1" cellpadding="5px" cellspacing="0" width="60%" align="center">
				<tr>
					<td>Start</td>
					<td><input type="number" min="1" max="1000" id="t1"/> </td>							
				</tr>	
				<tr>
					<td>End</td>
					<td><input type="number" min="1" max="10000" id="t2"/>  </td>							
				</tr>
				<tr>
					<td>Prime Number</td>
					<td><textarea rows="4" cols="30" id="ans"></textarea></td>							
				</tr>
				
				<tr>
					<td></td>
					<td><input type="button" value="Generate" onclick="genrate_prime()"/></td>							
				</tr>
			</table>
		</form>
	</body>
</html>