Write a Java program to check whether given number is prime number or not.
class PrimeNum {
public static void main(String args[]) {
int n = Integer.parseInt(args[0]);
boolean flag = false;
if(n==0 || n==1 || n==2)
System.out.println(n + " is a prime number");
else
{
for(int i=2; i<=n/2; i++)
{
if(n % i == 0)
{
flag = false;
break;
}
flag = true;
}
if(flag == true)
System.out.println(n + " is a prime number");
else
System.out.println(n + " is not a prime number");
}
}
}
C:\>javac PrimeNum.java
C:\>java PrimeNum 12
12 is not a prime number
C:\>javac PrimeNum.java
C:\>java PrimeNum 11
11 is a prime number