fact
Description
Returns the factorial of a number. The factorial of a number n is equal to 1*2*3*...* n
Parameters
Return Type
Number
Example
number a = fact(5);
print("a= " + a);
number b = fact(3.7);
print("b= " + b);
number c = fact(-3);
print("c= " + c);Prints:
a= 120 ;
b= 6;
c= NaN;