# Question type - Array dual scale/13/sl

### From LimeSurvey Manual

### Relevance equation

**Opis**

If the value of the relevance equation is "1" or "true", the question is "relevant" in the survey context, i.e. it is shown to the survey participant. If not, the question is hidden. Any survey question allows you to specify a relevance equation. This function is the successor of conditions and supports much more complex conditional logic.

**Označevanje sintakse**

Whenever you save the relevance equation, it is evaluated and syntax-highlighted. Any errors will be color coded so that you can quickly detect and fix them.

**Hint:**To check if all the relevance equations are used correctly within your survey, read about our show logic file feature.

**Veljavne vrednosti**

- Any equation that makes use of the Expression Manager syntax, without surrounding curly braces.

**Primeri**

Here are good examples of syntax highlighting.