matlab coding

The factorial of a positive integer number is defined by: n! n (n-1) (n-2) 3 x 2 x 1 where 0'-1. Write a user-defined function that calculates the factorial of a given number. For function name and arguments, use y-myfact(n). where the input argument n is the number, whose factorial is to be calculated and the output argument y is the value of n The function displays an error message if a negative or non-integer number is entered when the function is called. Use myfact with the following input numbers: . 121 6.71