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Calculation
Factorial Calculator
Calculate factorial (n!) and double factorial (n!!). Supports large numbers.
Factorial n!
Double Factorial n!!
digits
Como usar
Enter an integer n and both the factorial n! and the double factorial n!! are computed instantly. BigInt arithmetic keeps every digit exact even for large n where ordinary floating-point calculators overflow. Results can be copied with one click, which is handy for checking combinatorics homework or verifying values used in code.
- Factorial n! calculation
- Double factorial n!! calculation
- Exact big-number results via BigInt
- One-click copy of results
- Instant calculation
Casos de uso
- Permutation and combination calculations
- Probability and statistics basics
- Verifying outputs of your own code
- Exploring how fast factorials grow