Factorial

Calculate n! for non-negative integers.

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Overview

Factorial is the product of all integers from 1 to n. It is common in combinatorics, probability, and algorithm analysis.

This tool accepts n from 0 to 170 to keep precision in JavaScript.

Example

5! = 120

FAQ

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.