''' 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 DEFINITION
# def function_name( parameters ):
    # function body indented into the function

# All functions have a return value! It's either an explicit return value like 18 for voting_age or
# it returns None by default!


def voting_age() :
    age = 18
    return age

    # return ( This alone is returning None - Python default return value for a function with no explicit return value)
    # return 18 alone also works for this function!
    # return 19 # This code won't run because we already reached the return statement
    # print( age ) # This code is unreachable! Why? Because we already returned something! It's AFTER the return statement

# If you are in a for loop within a function and you hit the return statement, the function is complete and terminates.
# It will not run code afterwards once it reaches the return statement.

# You can have a function without a return statement! It's just that the value that gets handed back
# will be None!

# def dontreturn():
#     x = 18
# This function returns nothing so the return value is None!

# 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.

# WE DO NOT PUT INPUT STATEMENTS IN OUR FUNCTIONS!!!!!!!
# THE PARAMETERS ARE THE WAY THAT WE PASS VALUES IN TO START UP OUR FUNCTIONS.
# In function calls, we use arguments to start up the function by passing those arguments in as our parameters.
# so s is the parameter and 'CS 1112' is the argument!

def has_blanks( s ):                # s is our parameter that we need to provide an argument for when we call the function
    # print( s )
    number_blanks = s.count(" ")
    if ( number_blanks >= 1):
        return True
    else:
        return False
    # What's another way we could've implemented this function?
        # We can count the number of blanks and see if it's greater than 1
        # We can also use the 'in' keyword to see if the blank is in the string!

    # if (number_blanks >= 1):
    #     result = True
    # else:
    #     result = False
    # return result

    # if (" " in s):
    #     return True
    # else:
    #     return False

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

def great_seal():       # NO PARAMETERS
    output = "E Pluribus Unum"
    print( output)

# 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.


# Why didn't we convert n to an integer?
# We don't have to! We're assuming the arguments passed in are going to be integers!
# When we call the function we will do something like a_ing(5) not a_ing('5')

def a_ing( n ):             # n is a parameter!
    output = ''
    for i in range(0, n):
        output = output + 'a'
        print( output )

    # also could've done:

    # for i in range(1,n+1):
    #     output = 'a' * i
    #     print( output )