<HTML><HEAD><TITLE>Built-In Commands - incr manual page</TITLE></HEAD><BODY> <H3><A NAME="M2">NAME</A></H3> incr - Increment the value of a variable <H3><A NAME="M3">SYNOPSIS</A></H3> <B>incr </B><I>varName </I>?<I>increment</I>?<BR> <H3><A NAME="M4">DESCRIPTION</A></H3> Increments the value stored in the variable whose name is <I>varName</I>. The value of the variable must be an integer. If <I>increment</I> is supplied then its value (which must be an integer) is added to the value of variable <I>varName</I>; otherwise 1 is added to <I>varName</I>. The new value is stored as a decimal string in variable <I>varName</I> and also returned as result. <H3><A NAME="M5">SEE ALSO</A></H3> <B><A HREF="../TkCmd/expr.htm">expr</A></B> <H3><A NAME="M6">KEYWORDS</A></H3> <A href="../Keywords/A.htm#add">add</A>, <A href="../Keywords/I.htm#increment">increment</A>, <A href="../Keywords/V.htm#variable">variable</A>, <A href="../Keywords/V.htm#value">value</A> <HR><PRE> <A HREF="../copyright.htm">Copyright</A> © 1993 The Regents of the University of California. <A HREF="../copyright.htm">Copyright</A> © 1994-1996 Sun Microsystems, Inc. <A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE> </BODY></HTML>