Suppose that we have the following two dimensional array Wha

Suppose that we have the following two dimensional array. What is the output of each of the followings?

int[][] num = { { 3, 2, -1, 3}, {-2, 4, 7, -3}, {9, 4, -1, 0},{2, 8, -3, 7 }};

System.out.println(num.length);
System.out.println(num[2].length);
System.out.println(num[3][0]);
System.out.println(num[2][3]);
System.out.println(num[0][3]);
System.out.println(num[2][2]);
System.out.println(num[0][0]);

Solution

col1 col2 col3 col4

3 2 -1 3 row 1

-2 4 7 -3   row 2

9 4 -1 0 row 3

2 8 -3 7 row 4

       System.out.println(num.length); 4 //Which denotes no of rows in the 2-Dimensional array
       System.out.println(num[2].length); 4 //No of elements in the column 3
       System.out.println(num[3][0]); 2 //First element in the row 4
       System.out.println(num[2][3]); 0 //fourth element in the row 3
       System.out.println(num[0][3]); 3 //Fourth element in the row 1
       System.out.println(num[2][2]); -1 // Third element in the row 3
       System.out.println(num[0][0]); 3 // First element in the first row