## On this page

  

 

 # BeforeCond

 Last update: 17.07.2025 

Returns true if the input property is true at least once before the condition is true.

The following figure shows the output prop for the inputs p and c:

![Before Condition](/sites/default/files/git_ansys/scade_one_library_2024_r2_18_07_24/check__beforecond_00.png)

## Interface

NameKindTypeCommentpIboolInput propertycIboolInput conditionpropOboolValue of the property**Constraint**: The ratio period / timeSample must be greater than 2.

**Parent topic:**[Check](../../libraries/check/check.md)