Null

Null may refer to:

Science, technology, and mathematics

Astronomy

  • Nuller, an optical tool using interferometry to block certain sources of light

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 virtual file that discards data written to it, on Unix systems /dev/null
  • Null pointer or reference (sometimes written NULL, nil, or None), an object pointer (or reference) not currently set to point (or refer) to a valid object

Mathematics

  • Null (mathematics), a zero value in several branches of mathematics

Physics

  • Null (physics), a point in a field where the field quantity is zero
  • Null (radio), a concept in electromagnetism

Arts and media

People with the surname

  • Christopher Null (born 1971), American writer and film critic
  • Eduard van der Nüll (1812–1868), Austrian architect
  • Gary Null (born 1945), American radio host and author of works about alternative medicine
  • Keith Null (born 1985), American football player
  • Luke Null (born 1990), American actor and comedian

See also

  • Ø (disambiguation)
  • Null symbol (disambiguation)
  • 0 (disambiguation)
  • Nil (disambiguation)
  • Nul (disambiguation)
  • All pages with titles beginning with Null
  • All pages with titles containing Null
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.