Provided by: tcl8.4-doc_8.4.19-4ubuntu3_all bug


       global - Access global variables


       global varname ?varname ...?


       This  command  has no effect unless executed in the context of a proc body.  If the global
       command is executed in the context of a proc body, it creates local  variables  linked  to
       the  corresponding  global  variables  (and  therefore  these variables are listed by info

       If varname contains namespace qualifiers, the local variable's  name  is  the  unqualified
       name of the global variable, as determined by the namespace tail command.


       This procedure sets the namespace variable ::a::x
              proc reset {} {
                  global a::x
                  set x 0

       This  procedure  accumulates  the  strings  passed  to it in a global buffer, separated by
       newlines.  It is useful for situations when you want to build a message piece-by-piece (as
       if  with puts) but send that full message in a single piece (e.g. over a connection opened
       with socket or as part of a counted HTTP response).
              proc accum {string} {
                  global accumulator
                  append accumulator $string \n


       namespace(3tcl), upvar(3tcl), variable(3tcl)


       global, namespace, procedure, variable