function recursion            %f12                       J. Hill
% This function 
clc;                         %clear command window
number = input('input a numnber whose factorial you want: ');
fact_x = fctorial(number);
fprintf('the factorial of %g is %g\n',number, fact_x);
%-------------------------------------------------------------------------
function fact_x = fctorial(number);
disp(number);
if number <= 1
    fact_x = 1;
else
    fact_x = number * fctorial(number-1);
end