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<HTML><HEAD><TITLE>Built-In Commands - global manual page</TITLE></HEAD><BODY>
<H3><A NAME="M2">NAME</A></H3>
global - Access global variables
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>global </B><I>varname </I>?<I>varname ...</I>?<BR>
<H3><A NAME="M4">DESCRIPTION</A></H3>
This command is ignored unless a Tcl procedure is being interpreted.
If so then it declares the given <I>varname</I>'s to be global variables
rather than local ones.
Global variables are variables in the global namespace.
For the duration of the current procedure
(and only while executing in the current procedure),
any reference to any of the <I>varname</I>s
will refer to the global variable by the same name.
<P>
Please note that this is done by creating local variables that are
linked to the global variables, and therefore that these variables
will be listed by <B><A HREF="../TkCmd/info.htm">info locals</A></B> like all other local variables.
<H3><A NAME="M5">SEE ALSO</A></H3>
<B><A HREF="../TkCmd/namespace.htm">namespace</A></B>, <B><A HREF="../TkCmd/upvar.htm">upvar</A></B>, <B><A HREF="../TkCmd/variable.htm">variable</A></B>
<H3><A NAME="M6">KEYWORDS</A></H3>
<A href="../Keywords/G.htm#global">global</A>, <A href="../Keywords/N.htm#namespace">namespace</A>, <A href="../Keywords/P.htm#procedure">procedure</A>, <A href="../Keywords/V.htm#variable">variable</A>
<HR><PRE>
<A HREF="../copyright.htm">Copyright</A> &#169; 1993 The Regents of the University of California.
<A HREF="../copyright.htm">Copyright</A> &#169; 1994-1997 Sun Microsystems, Inc.
<A HREF="../copyright.htm">Copyright</A> &#169; 1995-1997 Roger E. Critchlow Jr.</PRE>
</BODY></HTML>