What is this math symbol called

if im not mistaken its called an evaluation.
if not then maybe its just called an interval
you should really use latex tho OP

could | be what you're looking for? As in shift+\ key under backspace? Don't know how to write notation in MS word but that would be my guess on first glance

Once you get the hang of Latex, it's extremely difficult to go back to word. There's a slight barrier to entry, however.

>extremely difficult
why exactly?

in ms word you can use latex-language in the eq.-editor, you know

heh heh I'm a real man, I get all the girls

I always carry a rubber around with me

heh heh yea, my copy of LaTex heh heh

en.wikipedia.org/wiki/Vertical_bar
I've usually heard/used pipe or bar

Jesus Christ there really is a wiki article for everything isn't there.

The equation editor is cumbersome and has nowhere near the same expressive power.

|

>MS Word