阶乘是应用于大于 0 的自然数的函数。阶乘函数的符号是一个感叹号加在数字之后,形式如下:2!
Factorial is a function applied to natural numbers greater than zero. The symbol for the factorial function is an exclamation mark after a number, like this: 2!
-
${n!}$ = represents factorial
-
${n}$ = Number of sets
Example
Calculate the factorial of 5 i.e. 5!.
Multiply all the whole numbers up to the number considered.