Recursive Programming Problem

Write a JAVA program that repeatedly prompts your user for a number, uses a recursive function to calculate the product of that number times three (3), and displays the product. Select a sentinel value that allows your user to quit. Do NOT use the multiplication operator (*) in your proposed solution.

User Inputs Recursive Function Returns
-2 -6
-1 -3
0 0
1 3
2 6
3 9
4 12
Hint: Think of multiplication as a series of additions.

User Inputs Performs Returns
1 3 3
2 3 + 3 6
3 3 + 3 + 3 9
4 3 + 3 + 3 + 3 12