val {
       var a 22
       var b 33
}</PRE>
<P>
will assign the value 22 to <CODE>
a</CODE>
 and 33 to <CODE>
b</CODE>
.</P>
<P>
Tcl braces act like quote characters in most other languages, in that they prevent any special interpretation of the characters between the left brace and the matching right brace.</P>
<P>
When an argument is in braces, then command, variable, and backslash substitutions do not occur in the normal fashion; all Tcl does is to strip off the outer layer of braces and pass the conte