Factorial

MEDIUMProcedures & Functions

Read a non-negative integer N (0 ≤ N ≤ 12). Output N! (N factorial).

Recall: 0! = 1, and N! = N × (N−1) × … × 1.

Input: A non-negative integer N. Output: The value of N!.

Example:

Input:  5
Output: 120

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Sample Test Cases

Test 1: 5!

Inputs: 5

Expected: 120

Test 2: 0! = 1

Inputs: 0

Expected: 1

Test 3: 1!

Inputs: 1

Expected: 1

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