Untitled

// Online Java Compiler
// Use this editor to write, compile and run your Java code online
import java.util.*;
class Main {
    public static void main(String[] args) {
        // System.out.println(isPerfectNumber(28));
        Scanner scan  = new Scanner(System.in);
        System.out.println("Enter a number :");
        int n=scan.nextInt();
        // isPerfectNumber(n);
        System.out.println(isPrime(n)?"Yes":"False");
        
    }
    
    static void isPerfectNumber(int n){
        int sum=0;
        for(int i=1;i<n;i++){
            if(n%i==0) sum+=i;
        }
        if(sum==n){
            System.out.println("Given number is a perfect number");
        }else{
            System.out.println("Given number is not a perfect number");
        }
        
    }
    
    static int factorial(int n){
        int ans=1;
        for(int i=1;i<=n;i++){
            ans*=i;
        }
        return ans;
    }
    
    static boolean isPrime(int n){
        int factors=0;
        for(int i=1;i<=n;i++){
            if(n%i==0) factors++;
        }
        return factors==2;
    }
}