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Factorial
01
the product of all positive whole numbers from 1 to a given number
Examples
The factorial of 5 is calculated as 5!=5×4×3×2×1=120.
In combinatorics, the factorial is used to determine the number of possible permutations of a set.
factorial
01
multiplying a whole number by all the smaller whole numbers down to 1
Examples
The factorial function is denoted by an exclamation mark (! ) and is used in combinatorial mathematics.
In probability theory, factorial calculations often appear in permutations and combinations.
