A factorial is the product of all positive integers less than or equal to a given non-negative integer.

How is a factorial calculated?

A factorial is calculated by multiplying the number by each integer less than it until 1 is reached.

What is the factorial of 0?

The factorial of 0 is defined as 1.

Factorial Calculator

The Factorial Calculator computes the factorial of a non-negative integer.

Input

How to Use This Tool

Enter a non-negative integer.
The calculator will automatically compute and display the factorial of the number.

Learn More About Factorial Calculator

Understanding Factorials

The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.

Factorial Formula

n! = n × (n-1) × (n-2) × ... × 3 × 2 × 1

Example

5! = 5 × 4 × 3 × 2 × 1 = 120

About

The Factorial Calculator computes the factorial of a non-negative integer. The factorial of a number 'n' is the product of all positive integers less than or equal to 'n'.

Use Cases

Calculating permutations and combinations in mathematics.
Solving problems in probability and statistics.
Used in various algorithms and mathematical formulas.
Determining the number of ways to arrange items in a sequence.

Frequently Asked Questions