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

# define helpful constant
VOWELS = "aeiou" # all caps tells us we should never change this, so we should never say VOWELS = ... anything
# defining constants in all caps is a style choice for Python, there is nothing special about it
# there are tools that will check variable names and see if you've ever changed it
# python/pycharm does not care if constants are defined in all uppercase

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

text = text.strip() # remove leading and trailing whitespace so first character is not whitespace

text = text.lower() # lowercase so we don't have to check capital and lowercase vowels

# determine its first character
first_character = text[ 0 ] # grab the first character of our cleaned up string
# don't worry about variable name length, take advantage of pycharm autocomplete

# determine whether first character is a vowel
if ( first_character in VOWELS ) : # condition/test expression goes in parentheses - what are you checking?
# if ( first_character == "a" or first_character == "e" or first_character == "i" or first_character == "o" or
# first_character == "u" ) will work as well
# if ( first_character == "a" or "e" ) will not work, it will always evaluate to True because "e" is always True
    # ( everything is True except 0 and "" )
# ** best way to check against multiple values is to have a list/string and use the in operator **
    # ** parentheses are unnecessary in Python, but it's good practice for other programming languages + CS 1112 style rule**
    # the test expression is going to evaluate to True or False
    # how does the in operator work?
        # probably uses the count function and checks if the value is >= 1
        # first_character in VOWELS is going to evaluate to True or False.
        # either the first_character is in VOWELS or it is not
    # this would work the same if VOWELS = [ "a" , "e" , "i" , "o" , "u" ]
    print( "Text begins with vowel" ) # if condition is True, execute this line
else :
    print("Text does not begin with vowel") # if condition is False, execute this line

# alternate using elif:
# if ( first_character == "a" )
#      ...
# elif (first_character == "e" ) and so on