A good answer might be:

Test A:
-20 19 1
Test B:

Test C:
19 1 5 -1 27 19 5

In "Test B" the method is asked to start with an index of -1. The test in the for loop returns false right away, and the loop body is never executed.

In "Test C" the method is asked to print beyond the end of the array, but it quits after it has printed the last element.

Sum Method

Here is the ArrayOps class, again, with a new method. This new method will add up all the elements in an array. 

class ArrayOps
{
  // . . . previous methods go here

  // add up all the elements in an array
  int sumElements ( int[] nums )
  {
    int sum = __________;

    for ( int __________; ___________; __________  )
      __________;

    return  __________;
  }

}

Here is how the method might be used in main(): 

class ArrayDemo
{
  public static void main ( String[] args ) 
  {
    ArrayOps operate = new ArrayOps();
    int[] ar1 =  { -20, 19, 1, 5, -1, 27, 19, 5 } ;
 
    System.out.println("The sum of elements is: " + 
      operate.sumElements( ar1 ) );   
  }

}

The declaration of the method says that it expects an array of int as a parameter, and that it will return an int back to the caller when it is done: 

int sumElements ( int[] nums )

QUESTION 13:

Fill in the blanks of the sumElements() method.