Related Function:

The FACT function returns the factorial of a number.




Argument Description
number The nonnegative number for which you want the factorial

  If number is not an integer, it is truncated


  A B C
1 Formula Result Notes
2 =FACT(5) 120 Factorial of 5, or 1*2*3*4*5
3 =FACT(1.9) 1 Factorial of the integer of 1.9
4 =FACT(3) 6 Factorial of 3, or 1*2*3

Common Function Error(s)

Problem What went wrong
#VALUE! Occurs if the supplied number argument is not recognized as a numeric value
#NUM! Occurs if the supplied number argument is < 0

The factorial of a number, n!, is the product of all positive integers less than or equal to n. For example:   

    \[    5! &= 5 x 4 x 3 x 2 x 1 = 120 \]

The factorial function is formally defined by the product:

    \[    n! &= \prod_{k=1}^n k   \]

See Wikipedia for more information on Factorial.