Expressions

For various conditional operations, a variety of expressions can be utilized. These expressions can be nested within one another, allowing for complex logical structures. Additionally, strings can be concatenated within these expressions.

It's important to note that the evaluation of these expressions follows a specific order, which dictates the precedence of operators and the sequence in which conditions are assessed. The order is outlined below.

Available Expressions

Expression	Description
()	Parentheses (defining scopes)
[]	Brackets (defining lists)
NOT	Negation
!!	Concatenation
EQ	Equals
NE	Not equals
LT	Less than
LE	Less equals
GT	Greater than
GE	Greater equals
IN	Contains (for lists)
AND	Conjunction
OR	Disjunction

Usage

Expressions are generally used with TEST- or IF-statements.

/* create new variable */
SET &TEST_VAR = 4;

/* expression in TEST-statements */
CALL
FILTER
    TEST = &TEST_VAR GT 3
EXEC
    SAY("Number is greater than 3");

/* expression in IF-statements */
IF(&TEST_VAR GT 3);
    CALL SAY("Number is greater than 3");
IF(END);

In the example above, we've used an IF-statement. More details on that in the next chapter.