programme for cheak number is prime or not in java

//programme for cheak number is prime or not in java 

class Prime
{   
    public static void main(String args[])
    {
    int n=8,i,f=0;
        
    for(i=2;i<=n;i++)
        if(n%i==0)
        {
            f=1;
            break;
        }
    if(f==1&&i==n)
        System.out.println(n+" is prime number");
    else
        System.out.println(n+" is not prime number");
    }
}

output