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Factorial
01
阶乘, 阶乘值
the product of all positive whole numbers from 1 to a given number
Example
The factorial of 5 is calculated as 5!=5×4×3×2×1=120.
5的阶乘计算为5!=5×4×3×2×1=120。
In combinatorics, the factorial is used to determine the number of possible permutations of a set.
在组合数学中，阶乘用来确定一个集合的可能排列数。
factorial
01
阶乘的, 阶乘型的
multiplying a whole number by all the smaller whole numbers down to 1
Example
The factorial function is denoted by an exclamation mark (! ) and is used in combinatorial mathematics.
阶乘函数用感叹号（!）表示，在组合数学中使用。
In probability theory, factorial calculations often appear in permutations and combinations.
在概率论中，阶乘的计算通常出现在排列和组合中。
