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Evaluate the following expression

1!

Factorial Definition

Product of positive integers ≤ n.
n! = n x (n - 1) x (n - 2) x ... x 2 x 1

Factorial Expansions are as follows:

1! = 1

1! = 1

Simplify factorial expansions:

1! = 1


Excel or Google Sheets formula:

Excel or Google Sheets formula:=FACT(1)

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What is the Answer?
1
How does the Factorials Calculator work?
Free Factorials Calculator - Calculates the following factorial items:
* A factorial of one number such as n!
* A factorial of a numerator divided by a factorial of a denominator such as n!m!/a!b!
* Double Factorials such as n!!
* Stirlings Approximation for n!
This calculator has 1 input.

What 1 formula is used for the Factorials Calculator?

n! = n * (n - 1) * (n - 2) * ... * 2 * 1

For more math formulas, check out our Formula Dossier

What 2 concepts are covered in the Factorials Calculator?

factorial
The product of an integer and all the integers below it
stirlings approximation
Example calculations for the Factorials Calculator
Factorials Calculator Video

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