How do you write Not equals

[Howard]

!= in ASCII, ≠ in actual writing

 

[veri745]

I would assume any of them mean "not equal to" except ~=, which I would be more inclined to think means "approximately equal to"

voted ≠, since that what most of these symbols are trying to emulate.

 

[CZroe]

if people dont get it, then they're just stupid

I agree, but I once had a college mathematics instructor count my answer wrong because she didn't understand !=. I explained it and got my points, but I still thought it was a "WTF?! How could I know this and someone who's lively-hood revolves around mathematics does not?!" situation. I figured it was only well known since people needed a way to write answers with ≠ using typewriters and computers that didn't always have access to that character.