Calculadora de Factorial — Fórmula
## How to Calculate a Factorial
### Formula
**n! = n × (n-1) × (n-2) × ... × 2 × 1**
Special cases:
- **0! = 1** (by definition)
- **1! = 1**
Factorials grow extremely fast. 10! = 3,628,800 and 20! = 2,432,902,008,176,640,000.
### Formula
**n! = n × (n-1) × (n-2) × ... × 2 × 1**
Special cases:
- **0! = 1** (by definition)
- **1! = 1**
Factorials grow extremely fast. 10! = 3,628,800 and 20! = 2,432,902,008,176,640,000.
Ejemplo Resuelto
Calculate 7!
- 7! = 7 × 6 × 5 × 4 × 3 × 2 × 1
- = 42 × 5 × 4 × 3 × 2 × 1
- = 210 × 4 × 3 × 2 × 1
- = 840 × 3 × 2 × 1
- = 2520 × 2 × 1
- = 5040