Returns the factorial of a number. The factorial of a number is equal to 1*2*3*...* number.
Syntax
FACT(number)
Number is the nonnegative number you want the factorial of. If number is not an integer, it is truncated.
Examples
FACT(1) equals 1
FACT(1.9) equals FACT(1) equals 1
FACT(0) equals 1
FACT(-1) equals #NUM!
FACT(5) equals 1*2*3*4*5 equals 120