The factorial of a number n {\displaystyle n} is n ! = n ⋅ ( n − 1 ) ⋅ ( n − 2 ) ⋯ {\displaystyle n!=n\cdot (n-1)\cdot (n-2)\cdots } , the product of positive integers up to n {\displaystyle n} . Factorial may also refer to:
Developed by StudentB