Symbols in the logic system

[Nemster]

Can anyone let me know what all the symbols mean? I have tried googling them to no luck. I know greater than less than crap I'm talking about == or =! the weird ones. Thanks!

 

[Fopje]

Can anyone let me know what all the symbols mean? I have tried googling them to no luck. I know greater than less than crap I'm talking about == or =! the weird ones. Thanks!

These are often used in programming

== means equal to (if IV == 90 then catch)
!= means unequal to (if IV != 90 then catch)

 

[Nemster]

weird to me sounds similar to greater than or less than