how to use key symbols?

[RajVerma]

hi all, if I want to put the string "$abcd" into my data file without having the intention of using abcd as a variable, then wat shud I do. Though I'm giving it in double quotes, it's still sayin that it cudn't find this variable. same case with "[]". so how shud I get rid of these errors?
thanq.
Raj.

 

[AviaTraining]

A quick quoting primer:[ul][li]Double quotes ([tt]""[/tt]) quote an argument, but allow substitutions to occur within the argument.[/li]
[li]Curly braces ([tt]{}[/tt]) quote an argument, but prevent substitutions from occurring within the argument.[/li][li]Square brackets ([tt][ignore][][/ignore][/tt]) aren't really quoting characters. They tell the Tcl interpreter to perform command substitution. The Tcl interpreter evaluates everything within the square brackets as a Tcl command, captures the return value of the command, and substitutes it for the entire square bracket expression. For example:

set c [string length "This is a test"]
puts $c
(prints out) 14

[/li][/ul]So, all you need to do in your case is:

puts {$abcd}

Alternately, you can use the backslash character (\) as an "escape" character in situations where Tcl would otherwise perform substitutions. For example:

puts "\$abcd"

- Ken Jones, President, ken@avia-training.com
Avia Training and Consulting,

http://www.avia-training.com

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