Expression Language Operators

Category	Operators
Arithmetic	+, -, *, / (or div), % (or mod)
Relational	== (or eq ), != (or ne), < (or lt), > (or gt), <= (or le), >= (or ge)
Logical	&& (or and), || (or or), ! (or not)
Conditional	A ? B : C (Evaluate A to Boolean. If true, evaluates and returns B. Otherwise, evaluates and returns C.)
Empty	= empty A (If A is null or is an empty string, array, Map, or Collection, returns true. Otherwise returns false.)