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