Java Program to check the square root of a number is prime or not


In this program, You will learn how to check the square root of a number is prime or not in java.


Some list of prime numbers is : 2, 3, 5, 7, 11

Example: How to check the square root of a number is prime or not in java

import java.util.Scanner;

class Main {
    public static void main(String args[]) {

        int n, i, j, p = 1, z;

        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number:");
        n = sc.nextInt();

        System.out.println("Square root is:" + Math.sqrt(n));
        z = (int) Math.sqrt(n);

        for (i = 2; i < z; i++) {

            if (z % i == 0) {
                p = 0;
                break;
            }
        }
        if (p == 1){
            System.out.println("Numbers is prime:" + z);
        }else{
            System.out.println("Numbers is not prime:" + z);
        }

    }
}

Output:

Enter a number:49
Square root is:7.0
Numbers is prime:7