Factorial Calculator
Worked example result
| n! (exact value) | 120 |
| Number of digits | 3 |
5! = 1 × 2 × 3 × 4 × 5 = 120 — which is why 5 different books can be arranged on a shelf in exactly 120 different orders.
n! = 1 × 2 × 3 × … × n, with 0! = 1 by definition · Powered by CalcHub — Factorial Calculator