''' Purpose: demonstrate a function side-effect in Python
'''

def out( x ) :
    ''' Does ???
    '''

    n = len( x )                    # Get the length of the list

    for i in range( 0, n ) :        # Loop through all the indexes from 0 to n-1
        print( x )                  # Print the list
        s = x[ i ]                  # Get the string at x[i]
        x[i] = s.capitalize()       # Change the list element to the capitalized version
                                    # of s

        # x [ i ] = something means I'm changing the element at list index i to something
        # list1 = ['hi','hello']
        #            0     1
        # list1[1] = 'whats up' # Change element at index 1!
        # list1 ['hi','whats up']  # What the list now looks like

        # x[ i ].capitalize()  # Change each element in the list at index i to 0
        # Strings are immutable so we cannot change the strings themselves
        # Rather, we can change elements at index positions in the list itself since
        # LISTS are mutable (changeable)