±

[sculptor]

How do I get this symbol ±
to show up in here without copy and paste?

 

[DaveC426913]

Num Lock on.
Hold Alt
Then numpad: 2,4,1.
±

 

[Janus58]

You can use the character map to generate all sorts of non-keyboard symbols:
alt-0228 = ä
alt-0176 = ° (degree symbol)
etc.

https://www.computerhope.com/jargon/c/charmap.htm

 

[James R]

Alternatively:

[tex]\pm[/tex]

 

[sculptor]

?

 

[DaveC426913]

?

That one's easy. Shift+/