Python programming.

Part A

For Part A, write a function with recursion that sings (i.e. prints) the North American road trip song, 99 Bottles of Beer

The function is defined as follows:

# function: sing

# input: a bottle count value (integer)

# processing: prints the lyrics to the song 99 Bottles of beer

# output: does not return anything

Example usage and output:

>>> sing(5)

5 bottles of beer on the wall, 5 bottles of beer.

Take one down, pass it around, 4 bottles of beer on the wall.

4 bottles of beer on the wall, 4 bottles of beer.

Take one down, pass it around, 3 bottles of beer on the wall.

3 bottles of beer on the wall, 3 bottles of beer.

Take one down, pass it around, 2 bottles of beer on the wall.

2 bottles of beer on the wall, 2 bottles of beer.

Take one down, pass it around, 1 bottle of beer on the wall.

1 bottle of beer on the wall, 1 bottle of beer.

Take it down, pass it around, no more bottles of beer on the wall!

>>> sing(test)

Invalid data

Some notes on your function:

One bottle is singular, while Two bottles is plural. This grammar should be correctly output by your program.

The last verse says, no more bottles of beer on the wall! instead of 0 bottles of beer on the wall.

You should not assume that the user will always pass in an integer, so be sure to do data checking

You must have at least one try, except statement in your function

I will test your function using floating point values, so be sure you handle decimal numbers (i.e. 1.8, 10.0, etc), its up to you how you handle them

You are not permitted to use a for or while loop in your function

After youve defined your recursive function, be sure to call it.

Here is my non-recursive program:

while True: #while TRUE  bottles = input('How many bottles of beer on the wall? ') #asking user for amount of bottles  if bottles == 'end': #if user types 'end' program will stop  print("Goodnight, let's play again later.") break   bottles = int(bottles) #turn bottles(string) into an integer  if bottles <= 0: #if bottles is equal to 0 or less than 0 user needs to type in a valid number  print("Sorry, that's not a valid number of bottles. Try again.") else: #if user tpyes in a valid number, program will work  print("OK, here we go!") for i in range(bottles, 0, -1): #setting up proper range  if i == 1: # if bottle is on '1' then a specific text will be printed.  print("1 bottle of beer on the wall, 1 bottle of beer.") print("Take it down, pass it around, no more bottles of beer on the wall!") else: print(str(i) + " bottles of beer on the wall, " + str(i) + " bottles of beer.") if i == 2: # setting up singular bottle  b = "bottle"   else: b = "bottles" #plural bottles  print("Take one down, pass it around, " + str(i-1) + " " + b + " of beer on the wall.") #decrementing the plural bottles down until it reaches singular bottle  print() print()