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"99 Bottles of Beer" or "100 Bottles of Pop on the Wall" is a traditional reverse counting song from the United States and Canada. It is popular to sing on road trips, as it has a very repetitive format which is easy to memorize and can take a long time when sung in full. In particular, the song is often sung by children on long school bus trips, such as class field trips, or on Scout or Girl Guide outings. 99 Bottles of Beer's lyrics can be printed in normal programming languages or esoteric programming languages.

History

The song is a variation of a 19th century college students' song "Forty-nine Blue Bottles a-Hangin' on the Wall" or simply "Forty-nine Bottles Hanging on the Wall". The melody and lyrics are recorded in a college songbook from 1890 as:

By 1898, a variation existed with the modern bottle count of 99 and the bottles specified as beer bottles.

Lyrics

The song's lyrics are as follows, beginning with n=99:

(n) bottles of beer on the wall.
(n) bottles of beer.
If one of the bottles just happen to fall,
(n−1) bottles of beer on the wall.

The same verse is repeated, each time with one bottle fewer, until there is none left. Variations on the last verse following the last bottle going down include lines such as:

No more bottles of beer on the wall,
no more bottles of beer.
Go to the store and buy some more,
99 bottles of beer on the wall...

Or:

No more bottles of beer on the wall,
no more bottles of beer.
We've taken them down
and passed them around;
now we're drunk and passed out!

Other alternate lines read:

If that one bottle should happen to fall,
what a waste of alcohol!

Or:

No more bottles of beer on the wall,
no more bottles of beer.
There's nothing else to fall,
because there's no more bottles of beer on the wall.

Or the song does not stop at the last "1" or "0" bottles of beer but continues counting with −1 (Negative one) Bottles of beer on the wall Take one down, pass it around, −2 (negative 2) bottles of beer on the wall... continuing onward through the negative numbers.

Full-length recitals

Singing all verses takes an extraordinarily long time. The American comedian Andy Kaufman used this for comedic effect early in his career when he actually sang all 100 verses.

Atticus, a band from Knoxville, Tennessee, recorded a thirteen and a half minute live version of the song in its entirety at the Glasgow Cathouse in Scotland. It was included in the 2001 album Figment. Rich Stewart aka Homebrew Stew listed it as the number one drinking song out of 86 in an article for Modern Drunkard Magazine the following year.

Mathematically inspired variants

Donald Byrd has collected dozens of variants inspired by mathematical concepts and written by himself and others. (A subset of his collection has been published.) Byrd argues that the collection has pedagogic as well as amusement value. Among his variants are:

• "Infinity bottles of beer on the wall". If one bottle is taken down, there are still infinite bottles of beer on the wall (thus creating an unending sequence much like "The Song That Never Ends").
  • "Aleph-null bottles of beer on the wall". Aleph-null is the size of the set of all natural numbers, and is the smallest infinity and the only countable one; therefore, even if an infinite aleph-null of bottles fall, the same amount remains.
  • "Aleph-one/two/three/etc. bottles of beer on the wall". Aleph-one, two, three, etc. are uncountable infinite sets, which are larger than countable ones; therefore, if only a countable infinity of bottles fall, an uncountable number remains.

Other versions in Byrd's collection involve concepts including geometric progressions, differentials, Euler's identity, complex numbers, summation notation, the Cantor set, the Fibonacci sequence, and the continuum hypothesis, among others.

References in computer science

The computer scientist Donald Knuth proved that the song has a complexity of ${\displaystyle O(\log N)}$ in his in-joke-article "The Complexity of Songs".

Numerous computer programs exist to output the lyrics to the song. This is analogous to "Hello, World!" programs, with the addition of a loop. As with "Hello, World!", this can be a practice exercise for those studying computer programming, and a demonstration of different programming paradigms dealing with looping constructs and syntactic differences between programming languages within a paradigm.

The program has been written in over 1,500 different programming languages.

Example

C

#include <stdio.h>
int main(void) {
  for (size_t i = 99; i > 0; i--) {
    printf("%zu bottle%s of beer on the wall, %zu bottle%s of beer.\nTake one down & pass it around, now there's ",
           i, (i == 1 ? "" : "s"), i, (i == 1 ? "" : "s"));
    printf((i > 1) ? "%zu bottle%s of beer on the wall\n"
                   : "no more bottles of beer on the wall!\n",
           i - 1, i==2?"":"s");
  }
}

Rust

fn main() {
    for i in (3..100).rev() {
        println!("{i} bottles of beer on the wall, {i} bottles of beer.\nTake one down and pass it around, now there's {} more bottles of beer on the wall!", (i - 1));
    }
    println!("2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, now there's 1 more bottle of beer on the wall!", );
    println!("1 bottle of beer on the wall, 1 bottle of beer.\nTake one down and pass it around, there's no more bottles of beer on the wall!");
}

Haskell

verses :: 
verses =
    "1 bottle of beer on the wall, 1 bottle of beer.\nTake one down and pass it around, there's no more bottles of beer on the wall!"
    : "2 bottles of beer on the wall, 2 bottles of beer.\nTake one down and pass it around, now there's 1 more bottle of beer on the wall!"
    : map (\n -> show n
        ++ " bottles of beer on the wall, " 
        ++ show n
        ++ " bottles of beer.\nTake one down and pass it around, now there's "
        ++ show (n-1)
        ++ " more bottles of beer on the wall!") 
main :: IO ()
main = mapM_ putStrLn (reverse $ take 99 verses)

Python

for i in range(99,0,-1):
  print(i,"bottles of beer on the wall,",i,"bottles of beer.")
  if i != 1:
    print("Take one down and pass it around, now there's",i-1,"more bottles of beer on the wall!")
  else:
    print("Take one down and pass it around, there's no more bottles of beer on the wall!")

See also

• "Potje met vet" – a traditional Dutch song sung in the same style
• "Ten Green Bottles" – a similar song which is popular in the United Kingdom

References

1. Found, Loise (1915). Folk-Song of Nebraska and the Central West. p. 75.
2. Howe, James Hamilton (1890). Songs of DePauw: a collection of college songs. J. M. Russell. p. 89.
3. "Ladies' Column". Queen's University Journal. 26: 35. November 26, 1898.
4. Nyberg, Tim (2006). 99 Bottles of Beer on the Wall: The Complete Lyrics. Andrews McMeel Publishing. p. 112. ISBN 978-0-7407-6074-7.
5. Baird, Kevin C. (2007). Ruby by example: concepts and code. No Starch Press. p. 25. ISBN 978-1-59327-148-0.
6. Cohen, Norm (2005). Folk Music: A Regional Exploration. Greenwood Press. p. 60. ISBN 0-313-32872-2.
7. Patton, Charlie (December 23, 1999). "Ever-annoying Andy Kaufman gets last laugh | Jacksonville.com". Archived from the original on February 1, 2018. Retrieved September 15, 2012.
8. Stewart, Rich. "Rhythm and Booze: The Top 86 Drinking Songs". Modern Drunkard Magazine. Retrieved December 13, 2018.
9. Byrd, Donald (November 30, 2015). "Infinite Bottles of Beer: Mathematical Concepts with Epsilon Pain, Or: A Cantorial Approach to Cantorian Arithmetic and Other Mathematical Melodies" (PDF). Indiana University, School of Informatics. Retrieved March 26, 2020.
10. Donald Byrd (2010). "Infinite Bottles of Beer: A cantorial approach to Cantorian arithmetic and other mathematical melodies". Math Horizons: 16–17.
11. Knuth, Donald. "The Complexity of Songs" (PDF). Retrieved September 2, 2020.
12. "Welcome to 99 Bottles of Beer". 99-bottles-of-beer.net.

• American folk songs
• American children's songs
• Traditional children's songs
• Drinking songs
• Songs about beer
• Songs with unknown songwriters