Simple program written in Java to check if number is a prime number.

import java.util.Scanner;

// ? 2017 TheFlyingKeyboard

public class CheckIfPrime {
  public static void main(String []args) {
      Scanner reader = new Scanner(;
      int n; 	
      boolean isPrime = true;
      System.out.println("Enter a number: ");
      n = reader.nextInt(); //Reads integer from keyboard
      for(int i = 2; i < n / 2; i++){
        if(n % i == 0){	//Checks if number can be divided without remainder
          isPrime = false;
          System.out.println("Number is not prime!");
        System.out.println("Number is prime!");


Java Check If Number Is Prime
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