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ENVIRON$                 Return Environment Table Entry

 s$ = ENVIRON$({parm | n})

    Returns the value of a specified entry in the current environment
    table.

        parm    A string expression specifying an environment parameter.

           n    An integer expression in the range 1 to 255 specifying the
                nth entry in the environment table.

   -------------------------------------------------------------------------

      Notes:    ENVIRON$ is case sensitive, so if parm does not exactly
                match a name in the environment table, the function
                returns a null string.

                If the argument is given as n, ENVIRON$ returns the nth
                entry in the table. Unless the table has been modified
                since bootup, the first entry will be COMSPEC, the second
                will be PATH (if a PATH command has been issued), and the
                third will be PROMPT (if a PROMPT command has been
                issued). If there is no nth entry, a null string is
                returned.