Introduction
FEEL expressions are powerful and can be used for various cases.
This section is split into expressions based on their operational data type:
The following sections cover more general areas that are not restricted to one data type:
Comments​
An expression can contain comments to explain it and give it more context. This can be done using
Java-style comments: // to the end of line, or /*.... */ for blocks.
// returns the last item
[1,2,3,4][-1]
/* returns the last item */
[1,2,3,4][-1]
/*
* returns the last item
*/
[1,2,3,4][-1]
Parentheses​
Parentheses ( .. ) can be used in expressions to separate different parts of an
expression or to influence the precedence of the operators.
(5 - 3) * (4 / 2)
x < 5 and (y > 10 or z > 20)
if (5 < 10) then "low" else "high"