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Foo
From Wikipedia, the free encyclopedia
Foo is a metasyntactic variable used heavily in computer science to represent concepts abstractly and can be used to represent any part of a complicated system or idea including the data, variables, functions, and commands just to name a few. Foo is commonly used with the metasyntactic variables bar and foobar. The word foo itself has no meaning and is merely a commonly used logical representation that is used much like the letters 'x' and 'y' in algebra.
Foo has entered the English language as a neologism due to its popularity in describing concepts in computer science and is considered by many to be the canonical example of a metasyntactic variable. It is used extensively in computer programming examples and pseudocode.
Example (pseudocode)
There are two functions: FOO and BAR FOO calls function BAR BAR returns the data BAZ
When there is more than one such abstract entitity to reference, the terms bar and baz are also usually used to refer to the second and third entities, respectively, as shown above. (In other words, the term 'bar' implies the existence of a primary entity 'foo', and so on.)
The placeholders make this a template for any program fragment wherein one function calls another which returns data to the first.
See Also
- Placeholder name
- foobar
- Fubar
- bar
- Hello World
- Meta
References
- The etymology of Foo
Categories: Computer programming | Placeholder names
