a list of arguments passed to the script. Unlike C, $argv does not include the name of the application itself among the argument list. For that, there is $argv0.
Not to be confused with $env(TCL_LIBRARY) . The initial value of this variable is aggreagated from the following sources , in order : the location of the Tcl startup script , $env(TCL_LIBRARY) , several other directories based on an internal algorithm , the location of the application executable file , and the current working directory .