Factorial Calculator

Calculate factorials and understand their significance in combinatorial probability.

Input Value

Enter a non-negative integer (n)*

The factorial is only defined for non-negative integers

The factorial of a non-negative integer n is denoted by n! and is defined as:

n! = n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1

Special cases:

For large values of n, Stirling's approximation can be used:

n! \approx \sqrt{2\pi n} \left(\frac{n}{e}\right)^n

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