CodingBat multiplyRecursive

multiplyRecursive

Using the following mathematical fact, a * b = a * (b - 1) + a define a recursive function that when passed two integers, returns their product without using the * operator or any loops.

multiplyRecursive(10, 500) → 5000
multiplyRecursive(-19, 2) → -38
multiplyRecursive(10, -5000) → -50000

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