Use mod operator to find out the even number
import java.util.Scanner; public class EvenNum { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Please enter the max number:"); int max = input.nextInt(); int i = 0; while ( i <= max) { if(i%2 == 0) System.out.println("Number " + i); i++;/*from w w w.j a va2 s . c o m*/ } } }