What Logical Operators are available for a "rule"


I am new to pvoutput and am trying to create a rule containing “IF” statement but the ‘help’ demonstrates the use of <, > and || only. Specifically I was looking for the “equals” which is obviously not “=” as this gives an error. I tried “==” which didn’t error but may or maybe not what I am looking for.
Specifically I would like use in an IF statement the operators for
Less than or equal
greater than or equal
not equal
equals – etc,etc or to know where I can look them up
I have programmed just about every language under the sun and most have different ways of programming logical expressions. I suspect you may be using Javascript of which I have zero knowledge.

== Equal to
!= Not equal
> Greater than
< Less than
>= Greater than or equal to
<= Less than or equal to


Great - thank you