What symbol is used to represent factorial in mathematics?

The symbol used to represent factorial in mathematics is the exclamation mark. Factorial, denoted by this symbol, refers to the product of all positive integers up to a specified number. For instance, the factorial of 5, written as 5!, is calculated as 5 × 4 × 3 × 2 × 1, resulting in 120. This notation is widely recognized and used in various areas of mathematics, particularly in combinatorics, algebra, and calculus. The other symbols mentioned, such as the hash, asterisk, and percent signs, are used for different mathematical operations and concepts, but none represent the factorial function.