Try creating the triangular array from the previous section into a simple class or in jshell. Here’s one way: 

Now expand that code to print the contents of triangle to the screen. To help, recall that you can print the value of an array element with the System.out.println() method: 

Your output will probably be a long, vertical line of numbers like this: 

0
1
2
2
3
4
3
4

5
6
4
5
6
7
8

int[][] triangle = new int[5][]; for (int i = 0; i < triangle.length; i++) { triangle[i] = new int [i + 1]; for (int j = 0; j < i + 1; j++) triangle[i][j] = i + j; }