Printing 1 to 100 without using any loop

1. Using Recursion :

import java.util.*;
class withoutLoop
{
  static int i = 0;
  public static void main(String[] args) {
    
      if(i < 100) {
      	System.out.println(++i);
      	main(null);
      }
  }
}

2. Using Stream :

  import java.util.stream.IntStream;

  class withoutLoop
  {
    public static void main(String[] args) {
      IntStream.range(1,101).forEach(e->System.out.println(e));
    }
  }

3. Another Method :

Using Arrays.fill( ) method and Anonymous inner class

  import java.util.*;

  class withoutLoop
  {
    public static void main(String[] args) {
      Object[] obj = new Object[100];
      Arrays.fill(obj,new Object(){
          int count=0;
          @Override
          public String toString() {
              return Integer.toString(++count);
          }
      });

      System.out.println(Arrays.toString(obj));

    }
  }

Output :

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]