nest 'for' loop.

 1 /*

 2 nest for loop demo.

 3 Note that,'upside' triangle controls 'inner condition'.

 4 */

 5 import kju.print.Print;

 6 public class Pyramid {

 7     public static void main(String[] args) {

 8         upsideNumbers(5);

 9         Print.println("------------------");

10         multiplicationTable(3);

11         Print.println("------------------");

12         pyramid(5);

13     }

14     /*shape begins:

15     ----*

16     ---* *

17     --* * * 

18     -* * * *

19     shape ends:*/

20     static void pyramid(int height){

21         for(int i = 0; i < height; i++) {    //all rows.

22             for(int j = i; j < height - 1; j++)    //vitual for '-'.

23                 Print.print(" ");

24             for(int j = 0; j <= i; j++) 

25                 Print.print("* ");

26             Print.println();

27         }    //for(i)

28     }

29 

30     /*shape begins:

31     1

32     12

33     123

34     1234

35     12345

36     shape ends:*/

37     static void upsideNumbers(int height) {

38         for (int i = 1; i <= height; i++) {

39             for (int j = 1; j <= i ; j++)

40                 Print.print(j);

41             Print.println();

42         }//for(i).

43     }

44 

45     /*shape begins:

46     1*1=1

47     1*2=2 2*2=4

48     1*3=3 2*3=6 3*3=9

49     shape ends:*/

50     static void multiplicationTable(int height){

51         for (int i = 1; i <= height; i++) {

52             for (int j = 1; j <= i; j++)

53                 Print.print(j + "*" + i + "=" + (j * i) + "\t");

54             Print.println();

55         }//for(i)

56     }

57 }