regex - Tcl regular expression to detect square brackets -

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i have .csv files many rows have 1 of field values this:

scl[0] scl[1] scl[2] sda[1] sda[2] sda[3]

i storing them in variable while reading csv files in line line format,like:

 set string [$m cell 0 1]

now when regexp check whether cell has scl[0] unable pass square bracket regular expression: gave syntax:

if{[regexp "scl\[0\]" $string]} { ... }

but if condition doesn't executed.

if in case of scl(0), i.e () instead of {} in csv file, gave {[regexp "scl\[(\]0\[)\]" $string]} worked. same format tried apply square brackets still doesn't evaluated.

am missing something?

please help.

thanks

note \ has special meaning inside double quotes. do:

regexp "scl\\[0\\]" $string

or:

regexp {scl\[0\]} $string

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