Calculate factorials instantly. Enter any non-negative integer to compute n! with step-by-step breakdowns for combinatorics and probability calculations.
Maximum value: 170 (to prevent overflow)
The factorial of a non-negative integer n, written as n!, equals the product of all positive integers from n down to 1.
n! = n × (n-1) × (n-2) × ... × 2 × 10! = 1 (by definition)
