module: Math
    function: factorial
        parameter:
            declare n:int
        return_type: int
        body:
            declare num1:int = 1
            loop:
                initializer:
                    declare counter:int = 1
                condition:
                    counter <= n
                update:
                    counter = counter + 1
                body:
                    num1 = num1 * counter
                end body
            end loop
            return num1
        end body
    end function
end module