Factorial Program

EasyPython

Problem

Quest Global engineering tools need a small utility that computes factorial values for input calculations. Given a non-negative integer n, return n!, defined as the product of every integer from 1 through n.

Formal Specification

Implement factorial(n).

Input: An integer n where 0 <= n <= 20.
Output: An integer equal to n!.
Define 0! as 1.
Use an iterative approach. Do not use Python's built-in factorial function.

Constraints

0 <= n <= 20
n is an integer
Return an integer result
Do not use Python's built-in factorial function

Function Signature

def factorial(n):

CodePython 3

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