A natural number that is greater than 1 , divided by 1 and itself is called prime number. In this tutorial, we are going to write a program to identify given number is prime or not.
import java.util.Scanner; public class PrimeNumber { public boolean isPrimeNumber(int number){ if (number == 0 || number==1) { return false ; } if (number == 2) { return true ; } for(int i=2; i<=number/i; i++){ if(number % i == 0){ return false; } } return true; } public static void main(String args[]){ PrimeNumber primenumber = new PrimeNumber(); System.out.print("Please Enter Number: "); Scanner read = new Scanner(System.in); int number = read.nextInt(); System.out.println("Is "+number+" prime number : " +primenumber.isPrimeNumber(number)); } }