''' Support your understanding of lists
        list building
'''


# get some lists

print()

# create and add to values
values = [ ]    # initiating our empty list --> accumulator --> accumulate elements to this list

# append( x ) is a list function
# it takes one argument that is the thing you want to put to the end of a list
values.append( "u" )        # values = ['u']
values.append( "v" )        # values = ['u', 'v']
values.append( "a" )        # values = ['u', 'v', 'a']
values.append( "!" )        # values = ['u', 'v', 'a', '!']
values.append( " " )        # so on...
values.append( "u" )
values.append( "v" )
values.append( "a" )
values.append( "!" )

print( "values  =", values )

input('Enter when ready: ')   # hits Enter key when you reach this point

# create and add to ints
ints = []

# for each int within the range [0, 10) - includes from 0 and up to but not including 10 == [0, 9]
# we append the int into the list ints
for i in range( 0, 10 ) :
    ints.append( i )

    print( "ints =", ints ) # indent the print statement here! this will print the list ints for each
    # run of the for loop

# print( 'ints =', ints ) # we print the final version of the list ints once after the for loop is done

# this is the same as the first few lines
# you can see how a for loop is helpful --> shortens your code a lot
s = 'uva! uva!'
letters = []
for ch in s:
    letters.append( ch )
    print( letters )