The Factorial Engine

Mission Briefing

The Alchemist's latest potion requires an exact factorial measurement of ingredients to prevent an explosion.

The Concept: Accumulators

Instead of starting with 0 and adding, you can start an accumulator variable at 1 and multiply it inside a loop. A factorial of n (written as n!) is the product of naturally descending numbers. E.g., 4! = 4 * 3 * 2 * 1 = 24.

The Objective

Your function receives a number n.

1. Use a loop to calculate the factorial of n.
2. Return the final calculated product.