I have a text file that has many correct prices (decimals that start with a dollar sign). But there are a few that don't have a dollar sign. How can I find those?

In the following string, I only like to match. 72.00

$40.00 72.00 $6

I have tried negative lookbehind, like this (?<!\$)\d \.\d . But this one still matches part of the first decimal.

CodePudding user response：

You can start the match with a word boundary to not trigger the lookbehind on every position when not matching a decimal value:

\b(?<!\$)\d \.\d \b

See a regex101 demo.