Question

Using Java.

Write a program that creates a “triangular” two-dimensional array A of 10 rows. The first row has length 1, the second row has length 2, the third row has length 3, and so on. Then initialize the array using nested for loops so that the value of A[i][j] is i+j. Finally, print out the array in a nice triangular form.

Answer 1

public class TriangularArray {
    public static void main(String[] args) {
        int triangular[][] = new int[10][];

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

        for(int i = 0;i<triangular.length;i++){
            for(int j = 0;j<triangular[i].length;j++){
                triangular[i][j] = i+j;
            }
        }

        for(int i = 0;i<triangular.length;i++){
            for(int j = 0;j<triangular[i].length;j++){
                System.out.print(triangular[i][j]+"\t");
            }
            System.out.println();
        }

    }
}