who can help me to solve it by Matlab?

2) Create a script which prompts the user for a non-negative integer, and then computes the factorial of the integer (and does NOT use the canned Matlab command 'factorial'!). Please note that the integer should be tested, and three cases need to be addressed: (1) the number is NOT a non-negative integer, so the script should print an error message and quit; (2) the integer is 0, and the script returns the answer 1; and (3) the integer is positive, and a loop is run to compute and display the answer. Make sure to run a test case for case (1), a test case for case (2), and at least 3 test cases for case (3), and include those results in your Word doc