Factorial

Features

The Factorial Calculator is a practical online math tool for calculating factorial of non-negative integers. Factorial is widely used in probability theory and combinatorics.

Main Features

1. Factorial Calculation

Enter a non-negative integer to calculate its factorial

2. Formula Display

For smaller numbers, show the complete factorial formula

3. Quick Reference

Built-in quick reference for common factorial values

4. One-Click Copy

Calculation results can be copied to clipboard with one click

How to Use

1. Enter the number to calculate factorial (non-negative integer) in the input box
2. Click the "Calculate Factorial" button to get the result
3. If you need to copy the result, click the "Copy Result" button

Use Cases

• Probability Calculation: Permutations and combinations
• Math Learning: Understanding factorial concepts
• Statistical Analysis: Data processing
• Daily Calculation: Factorial-related operations

FAQ

What is Factorial?

Factorial is the product of all integers from 1 to that number. For example: 5! = 1 × 2 × 3 × 4 × 5 = 120

What is 0!?

0! = 1, this is a special convention

Can factorial be used for negative numbers?

No, factorial is only defined for non-negative integers