__isVarDefined

Also documented in context in the full Functions and Variables reference.

The __isVarDefined function returns true if variable exists or false if not.

Name	Required	Description
Variable Name	Yes	The Variable Name to be used to check if defined

Example:

\${__isVarDefined(JMeterThread.last_sample_ok)}

will return true

Related

• Functions and Variables Guide
• Regex Extractor Builder
• Full Functions Reference
• Component Reference