Expression language operators

In order of highest precedence…

`()`	Grouping
`-a`	Unary negation
`a^b`	Raise to exponent
`* / %`	Times, divide, modulus
`+ -`	Add, subtract
`< > == != \|\| &&`	Less than, greater than, equals, not equals, or, and

In addition to the straight expression syntax, you can use traditional C structures such as if, for, while, and return when defining custom expression functions.