''' Name:
    Email id:

    Purpose: develop programmer-defined functions
'''

# function voting_age(): returns how old you need to be to vote; i.e. the
#     integer 18.

# Function Writing:
# def function_name(parameters):
    # function body

def voting_age():
    '''
    Returns how old you need to be to vote in the US; i.e. the integer 18
    '''
    return 18

# function has_blanks( s ): returns a whether s contains at least one blank
#     character; i.e., returns True if s contains a blank, and returns
#     False otherwise.

def has_blanks( s ):
    '''
    returns a whether s contains at least one blank
    character; i.e., returns True if s contains a blank, and returns
    False otherwise.
    '''

    blank = " "
    if ( blank in s ): # if (" " in s):
        # found a blank
        result = True
    else:
        # no blank
        result = False

    return result # result will be True or False

    # if s.count( blank ) > 0 works too!

# function great_seal( ): prints the string 'E Pluribus Unum'

def great_seal():
    '''
    prints the string 'E Pluribus Unum'
    '''
    print( 'E Pluribus Unum' ) # but remember print is not the same as return!

# function a_ing( n ) prints n lines of output. The first line prints a
#     single 'a', the second line prints 'aa', the third line prints 'aaa',
#     and so on.

def a_ing( n ):
    '''
    prints n lines of output. The first line prints a
    single 'a', the second line prints 'aa', the third line prints 'aaa',
    and so on.
    '''
    # Accumulator
    current_output = '' # Initialize an empty string and gradually add an a to the accumulator
    for i in range( 0, n ):
        current_output = current_output + 'a'
        print( current_output )

    # Alternate way - No Accumulator
    # for i in range(1,n+1):
    #     a_s = 'a'*i # concatenates this many 'a's together
    #     print(a_s)

# You can have functions that explicitly return something or don't have an explicit return
# statement! But all functions return something!
# You can have functions with no parameters!