Please describe each step also I dont understand the step of i and j and why we put it in the code Thank you

Exercise #05: (Balls.java) A child places I ball in Row 1. 3 balls in Row 2,5 balls in Row 3. ... as shown below: 000 00000 0000000 000000000 Write a program in Java that takes as input the value of n (the number of rows). It then prints the pattem above, and the total number of balls placed by the child. Sample output: Enter the number of rows> 5 000 00000 0000000 000000000 The total number of balls is 25. HULLE