How do you write piece-wise functions?

Question

dude · Answer

$\begin{cases}
2x+3 & {if~x<0} \
1 & {if~x=2} \
 x^2  & {if~x>2}
\end{cases}$

testIhopeitworks

dude · Answer

```latex
$\begin{cases}
     2x+3 & {if~x<0} \ /*This is where the first second and every 
                                   other eq would go, separate by line using 2 backslashes*/
     1 & {if~x=2} \
     
     x^2  & {if~x>2}
\end{cases}$```

mhchen · Answer

That is amazing

mhchen · Answer

unfortunately it doesn't work with the latex I'm using on another site.
I'll just post it on this site and screenshot it.

mhchen · Answer

$\begin{cases}
0 & {if~a_{nn} \neq 0} \
1 & {if~a_{nn}=0}
\end{cases}$

dude · Answer

Aw rip

Yeah all sites always have variating syntax