EnvironmentVariableExists
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::InstallAPI::EnvironmentVariableExists


Check to see if a given environment variable exists or not in the current system environment.


Technical Detail

This API call just looks into Tcl's ::env() array to see if the variable exists or not.  The ::env() array is built by Tcl based on the user's environment.



Supported Platforms

All



Returns

True or false.


Options


-variable <varName> (required)

The variable to check for existence.