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BJP4 Exercise 12.8: multiplyEvens

Language/Type: Java recursion recursive programming
Author: Whitaker Brand (on 2016/09/08)

Write a method multiplyEvens that returns the product of the first n even integers. For example:

Call Output Reason
multiplyEvens(1); 2 2 = 2
multiplyEvens(2); 8 2 * 4 = 8
multiplyEvens(3); 48 2 * 4 * 6 = 48
multiplyEvens(4); 384 2 * 4 * 6 * 8 = 384

You should throw an IllegalArgumentException if passed a value less than or equal to 0.

Type your solution here:

This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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