Finding words strictly starting with $, Regex C#

Question

I need to find all matches of word which strictly begins with "$" and contains only digits. So I wrote

[$]\d+

which gave me 4 matches for

$10 $10 $20a a$20

so I thought of using word boundaries using \b:

[$]\d+\b

But it again matched

a$20 for me.

I tried

\b[$]\d+\b

but I failed.

I'm looking for saying, ACCEPT ONLY IF THE WORD STARTS WITH $ and is followed by DIGITS. How do I tell IT STARTS WITH $, because I think \b is making it assume word boundaries which means surrounded inside alphanumeric characters.

What is the solution?

Answer 1

Not the best solution but this should work. (It does with your test case)

(?<=\s+|^)\$\d+\b

Answer 2

Have you tried

\B\$\d+\b

Answer 3

Try with ^\$\d+

where ^ denoted the beginning of a string.

Answer 4

You were close, you just need to escape the $:

\B\$\d+\b

See the example matches here: http://regexhero.net/tester/?id=79d0ac3b-dd2c-4872-abb4-6a9780c91fc1