''' Purpose: use if-else statement
'''

# Python if statement:
    # if (condition):
        # do this
    # elif (condition):
        # do this
    # else:             # NO CONDITION (basically says if we didn't jump into any other condition, do this!)
        # do this

# Once it meets a certain condition, it jumpts into that block and doesn't test the ones after it.
# This is super important because you want to make sure your tets / condition testing is in the right order
# so that you don't jump into a certain conditional block (indented if/elif block) if it should test
# another one before it.

# define helpful constant
VOWELS = "aeiou"

# get input text and put into canonical form
text = input( 'Enter text: ' )

text = text.strip()

text = text.lower()

# determine its first character
first_character = text[0]
# print('first character:', first_character )

# determine whether first character is a vowel

# This loop IS going through every vowel. It just won't jump into the if block for all the vowels
# right because we're only checking the first character and the first character can't be
# all five vowels :)

# Loop version
for vowel in VOWELS: # Loop through each character vowel in VOWELS ('a',then 'e', then 'i', etc.)
    if (first_character == vowel): # if the first character matches the vowel we're on
        print('First character begins with a vowel!')
    else:
        pass # do nothing (move onto the next value in the for loop)

    # else: # This else statement gets executed for all of the other characters! We don't want that!
    #     print('First character does NOT begin with a vowel!') # Since the other characters aren't vowels

# You don't need an else if you have an if statement.

# You can do:
# if ():
    # do this

# if ():
    # do this
# else:
    # do this

# if():
    # do this
# elif():
    # do this
# else:
    # do this

# without a Loop
# if ( first_character in VOWELS ): # if the first character is in the string 'aeiou' (if it's one of the vowels in the string!)
#     print('First character begins with a vowel!')
# else:
#     print('First character does NOT begin with a vowel!')

# Recall the in keyword will check if the thing on the left is in the sequence on the right
# if (... in sequence):

# if (... not in sequence): # checks if the thing on the left is NOT in the sequence on the right

# VOWELS 'aeiou'
# first_character 'a'
# if (first_character in VOWELS): -> if 'a' in 'aeiou' (it is!) this evaluates to True so we
# jump into that block and print out that the 'First character begins with a vowel!'