Write a program to output 0123401234

LoopTwice.java

public class LoopTwice {
  public static void main(String[] args) {
    for (int i = 0; i < 2; i++) {
      for (int x = 0; x < 5; x++) {
        System.out.printf(x);
        }
      }
    }
  }