99 bottles using PDD

01.rb

# sing "99 bottles of beer on the wall..."
# sing "98 bottles of beer on the wall..."
# ...keep counting down...

02.rb

# sing "99 bottles of beer on the wall..."
puts "99 bottles of beer on the wall..."

# sing "98 bottles of beer on the wall..."
puts "98 bottles of beer on the wall..."

# ...keep counting down...

03.rb

# over and over again:
  # sing "[however many you have] bottles of beer on the wall..."

04.rb

# over and over again:
while true do
  # sing "[however many you have] bottles of beer on the wall..."
  puts "#{number_of_beers} bottles of beer on the wall..."
end # pass it around!

05.rb

# start at 99
number_of_beers = 99

# over and over again:
while true do
  # sing "[however many you have] bottles of beer on the wall..."
  puts "#{number_of_beers} bottles of beer on the wall..."
end # pass it around!

06.rb

# start at 99
number_of_beers = 99

# over and over again:
while true do
  # sing "[however many you have] bottles of beer on the wall..."
  puts "#{number_of_beers} bottles of beer on the wall..."
  
  # take one down!
  number_of_beers = number_of_beers - 1
end # pass it around!

07.rb

# start at 99
number_of_beers = 99

# over and over again:
while number_of_beers > 0 do # but only while we have beers left!
  # sing "[however many you have] bottles of beer on the wall..."
  puts "#{number_of_beers} bottles of beer on the wall..."
  
  # take one down!
  number_of_beers = number_of_beers - 1
end # pass it around!