| Symbol/Unicode | Not equal/U+2260 | 
|---|---|
| Type of symbol | Inequality | 
| Package (requirement) | No | 
| Argument | No | 
| Latex command | \ne | 
| Example | \ne→ ≠ | 
The most popular symbol used in mathematics is “not equal”. In Latex, you need to use \ne command for this symbol, you can also use \neq command.
\documentclass{article}
\begin{document}
   \[ a \ne b \]
   \[ \cos x \ne \sin x \]
   % Use \neq command 
   \[ 5 \neq 3 \]
   \[ x^2 + 1 \neq y^2 + 1 \]
\end{document}Output :
