Find Prime No. Using Java Script

Find Prime No. Using Java Script

Java script has  very simple code for browser. Generally java script is used to restrict user. But you can learn java script by playing with coding.

Program:

var num =prompt("Enter a number");
parseInt(num);var i;var b=0; if(num==1)
{
alert("A prime number is a number which has only two factors, 1, and itself. But in the case of 1, there is only one factor: 1. So, 1 is not a prime number");
}
else{
for(i=1;i<=num;i++)
{
var result = num%i;
if(result==0)
{
b++;
} }
if(b<=2)
{
alert("Prime no.");
}
else
{
alert("Not Prime");
}
}