getting a string from user while executing a tcl script

Hi All,

I am executing a Tcl script and i am trying to get the user input while they execute the script at start itself like

>>filename.tcl USERINPUT

and then i will take this userinput inside the the tcl assign it to some variable for further manipulation/processing ...... can anyone pls suggest me how to make this happen ?

Many examples of passing arguments to Tcl scripts on this site:

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