The Cruise Line Factorial

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The Cruise Line Factorial

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In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, the value of 0! is 1, according to the convention for an empty product.[1]

The factorial operation is encountered in many different areas of mathematics, notably in

combinatorics, algebra and mathematical analysis. Its most basic occurrence is the fact that there are n! ways to arrange n distinct objects into a sequence (i.e., permutations of the set of objects). This fact was known at least as early as the 12th century, to Indian scholars.[2] The notation n! was introduced by Christian Kramp in 1808.

Factorial