</source>'''NOTE:''' Running functions with multiple arguments is the same. When you put a function as a argument of another function, the '''inner-most function will run first''', and the return the value '''10''' from the will be used as the argument for the '''outer function'''. In the example below, '''sum_numbers(5, 5)''' will return '''10''', thus providing that result to be square with that value '''square(10)'''.<br><br>