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Null

Null may refer to:

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Explanation

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Null may refer to:

Science, technology, and mathematics

Computing

  • Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value
  • Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol has no visual representation.
  • Null device, a special computer file that discards all data written to it
  • Null modem, a specially wired serial communications cable
  • Null object pattern, a software design pattern using an object with defined neutral behavior
  • Null pointer (sometimes written NULL, nil, or None), used in computer programming for an uninitialized, undefined, empty, or meaningless value
  • Null route, a network route that goes nowhere
  • Null string, the unique string of length zero (in computer science and formal language theory)
  • Null-terminated string, a character string of which the length is determined by the first null-character (in programming language C and related languages)
  • Nullable type, a feature of some statically-typed programming languages which allows a data type to be set to the special value NULL

Mathematics

Physics

Other uses in science and technology

Arts and media

Music

Other media

People

Other uses

  • Null and void, having no legal validity
  • Null-A, a term used in science fiction, referring to Korzybski's notation as an abbreviation for "non-Aristotelian" logic
  • Stunde Null, a term used in Germany to mark the end of the Second World War

See also

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