Mathematics (General)
Factorial Calculator
Lets users solve and check factorial instantly with formula, steps and examples — no manual math.
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Factorial (n!)
120
5! = 120
About this calculator
n! (n factorial) is the product of all positive integers up to n: 5! = 5×4×3×2×1 = 120. By definition 0! = 1. Grows extremely fast; 170! is near the floating-point limit.
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