Iterative Factorial

Problem

Compute n! for a non-negative integer n using an iterative loop.

By definition 0! = 1 and 1! = 1, and n! = 1 * 2 * ... * n for n >= 2. Return the exact integer value.

Hint

Start from 1 and multiply by every integer from 2 through n.

case 1

in: [5]

expected: 120

case 2

in: [0]

expected: 1

case 3

in: [1]

expected: 1

case 4

in: [12]

expected: 479001600

Starter codePython

def factorial(n):
    # Your code here
    pass

4 test cases · run your code against them in the editor