Null

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Null may refer to:

In computing[edit]

  • Null (SQL), a special marker and keyword in SQL
  • Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler
  • 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), used in computer programming for an uninitialized, undefined, empty, or meaningless value
  • 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

In art[edit]

In mathematics[edit]

In science[edit]

People[edit]

Other[edit]

  • Null and void, having no legal validity
  • Null-A, a term used in science fiction, referring to Korzybski's notation \overline{A} as an abbreviation for "non-Aristotelian"

See also[edit]