ters after the $, up to the first character that is not a number, letter, or underscore, are taken as a variable name and the string value of that variable is substituted for the name. Or, if the dollar sign is followed by an open curly brace, then the variable name consists of all the characters up to the next close curly brace. For example, if variable <CODE>
outfile</CODE>
 has the value <CODE>
test</CODE>
, then the command:</P>
<PRE>var a $outfile.c</PRE>
<P>
is equivalent to the command:</P>
<PRE>var 