Translations:ExpressionScript - Presentation/40/en
From LimeSurvey Manual
The ExpressionScript supports the following syntax:
- All standard mathematical operators (e.g. +,-,*,/,!);
- All standard comparison operators (e.g. <,<=,==,!=,>,>=, plus their equivalents: lt, le, eq, ne, gt, ge);
- Parentheses (so you can group sub-expressions);
- Conditional operators (e.g. &&,| | and their equivalents: and, or);
- Single and double-quoted strings (which can each embed strings with the other quote type);
- Comma operator (so can have a list of expressions and just return the final result);
- Assignment operator (=);
- Pre-defined variables (to refer to questions, question attributes, and responses) - e.g., the SGQA codes;
- Pre-defined functions (there are already 80+, and it is easy to add more).