At 2007-11-08 02:53AM, "Helmut Giese" wrote: > On Thu, 08 Nov 2007 05:18:55 -0000, "vinayak.mdesai@gmail.com" > <vinayak.mdesai@gmail.com> wrote: > > >Hi, > > > >I am bit confused here... > > > >% regexp \$100 \$100 > >0 > >% regexp \$100 "\$100" > >0 > >% regexp $100 "\$100" > >can't read "100": no such variable > >% regexp \$100 $100 > >can't read "100": no such variable > >% > Hi, > if you can put your RE pattern into braces life is usually much > easier. Try > regexp {\$100} \$100 The reason is that the "$" is a RE constraint char (match end of line), so is has to be escaped in your regex. If you don't want to brace the regex you have to escape the escape: % set str {$100} $100 % regexp {\$100} $str ;# match a dollar sign and the digits 1, 0, 0 1 % regexp \\\$100 $str ;# as above 1 % regexp \$100 $str ;# match end-of-line followed by 1, 0, 0 (impossible) 0 -- Glenn Jackman "You can only be young once. But you can always be immature." -- Dave Barry