java program to check that the number given by user is 'prime' or not.

import java.util.*;

public class HelloWorld {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
boolean prime=true;
for(int i=2;i<n/2;i++)
{
if(n%i==0)
{
prime=false;
break;
}
}
if(prime)
{
System.out.println("yes");
}
else
{
System.out.println("no");
}
}
}