• Develop code to represent nested iterative processes and determine the result of these processes

Assignment

Loops are good working in one dimension, but what about second dimension? Putting a loop inside another loop will get that done. Before doing anything in the book, I suggest running the loop below and make sure you understand how it works.

1
2
3
4
5
6

for (int i = 0; i <= 7; i++) {
    for (int j = 0; j <= 5; j++) {
        System.out.print("(" + i + ", " + j + ")\t");
    }
    System.out.println();
}

The outer loop increments after the inner completely finishes, so the pattern of what happens is

  1. Inner loop begins with i = 0 and j = 0
  2. Inner loop finishes with i = 0 and j = 5
  3. Outer loop updates with i++
  4. Inner loop begins with i = 1 and j is redeclared and reset to 0

Variables are local to block where they are declared. Since j is declared in the inner loop, it cannot be used outside of it. It’s redeclared and reset to zero every time that loop restarts.