A factorial notation is a mathematical notation used to represent the product of all positive integers up to a specified number. It is denoted by an exclamation...
A factorial notation is a mathematical notation used to represent the product of all positive integers up to a specified number. It is denoted by an exclamation point, "!", placed after the number.
For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
This notation is used in various mathematical areas, including permutations and combinations, to express the total number of possible arrangements or combinations of items taken a certain number of at a time