How do I write not equal to sign (equivalent of != in C) in Latex pseudocode.

  • 19
    Do you mean $\neq$?
    – Daniel Fischer
    Jul 18, 2012 at 9:23
  • 2
    Or, what doesn't work for you using != Jul 18, 2012 at 9:38

3 Answers 3


Not equal can be written as:


If you want a literal != in a pseudocode listing, you can use \mathrel{\mathtt{!=}}. You could also use ≠ from the monospace font.

Unicode also has the symbol ⍯ from APL. It’s U+236F, and you can use it in LuaLaTeX or XeLaTeX.


$\neg$ is - and $\not=$ is the equal sign with the slash through the center

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