Hello.

I’ve added a new class called SumListIterative in our codebase. This class provides methods to sum elements of a list of integers, longs, and doubles. Here’s a brief overview of the changes:

New Methods: The SumListIterative class includes three methods:

1: sumInt(List list): Sums the elements of a list of integers.
2: sumLong(List list): Sums the elements of a list of longs.
3: sumDouble(List list): Sums the elements of a list of doubles.

Javadoc Comments: I’ve added Javadoc comments for each method to provide a clear explanation of what each method does.

Basic Tests: I’ve also included some basic tests in the main method for each sum method.