# Programming Gambas from Zip/OperatorPrecedence

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## Operator Precedence

[edit | edit source]*In an expression, which part gets worked out first, then which operations are worked out next?*

For example, is 2 + 3 * 4 equal to 20 (+ first, * second) or is it 14 (* first, then +)? Multiplication precedes addition, so the expression comes down to *14*.

*Rules:*

- Things are worked out before they are compared.
- Anything in brackets is worked out first.
- The highest priority is changing the sign (–) or reversing true/false with NOT.
- Strings are joined before paths are assembled. (& is done before &/).
*Powers*are done before*multiplication or division*, which are done before*addition or subtraction*.- Where there are several operations and they all have the same precedence, the order is left to right but it does not matter because 3 * (4 / 2) is the same as (3 * 4) / 2
- Comparisons are worked out before they are
*AND*ed,*OR*ed or*XOR*ed with other comparisons.

*Examples:*

4 ^ 2 * 3 ^ 3 *is the same as* (4 ^ 2) * ( 3 ^ 3 )

a > 10 AND a < 20 *is the same as* ( a > 10 ) AND ( a < 20 )

4 * 2 + 3 * 3 *is the same as* ( 4 * 2 ) + ( 3 * 3 )

4 + 2 = 5 + 1 *is the same as* ( 4 + 2 ) = ( 5 + 1 )