# ST language operators

In the ST language, an expression consists of operators and operands. Operands are literals, enumeration types, variables, function calls with values, method calls with values, or function block calls with values.

Operator | Description | Example | Priority | ||
---|---|---|---|---|---|

() | Parentheses | (A+B)/C | 11 (highest) | ||

Evaluation of a function or of a method | Identifier | LN(A) | 10 | ||

Dereference | R | 9 | |||

- | Negation | -A | 8 | ||

+ | Unary plus | +B | 8 | ||

NOT | Negation | NOT C | 8 | ||

** | Exponentiation | A**B | 7 | ||

* | Multiplication | A*B | 6 | ||

/ | Division | A/B | 6 | ||

MOD | Modulo | A MOD B | 6 | ||

+ | Adding | A+B | 5 | ||

- | Subtracting | A-B | 5 | ||

< , > , ⇐ , >= | Comparison | A<B | 4 | ||

= | Equality | A=B | 4 | ||

<> | Inequality | A<>B | 4 | ||

AND, & | Logical AND | A AND B | 3 | ||

XOR | Logical exclusive OR | A XOR B | 2 | ||

OR | Logical OR | A OR B | 1 |