Null symbol

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Null symbol may refer to:

  • Null character, U+0000, (␀), U+2400 "symbol for null", a single-character glyph "NUL"
  • Null sign (∅), the empty set
  • Null (SQL) (ω), a special marker and keyword NULL in SQL
  • Empty string (λ, Λ, or ε), in formal language theory

See also[edit]