regular expression for # tags

Question

Using regular expression for identifying #tags

Like How are you #friends #today is #great day.

Condition should be # should be starting of word. it contains letters,digits and - .

-should not appear just after the #. after and before - there should be character or digit.

A string can contain multiple tags.

How to write regular expression for itentifying above #tags.

I tried this #{1}[A-Za-z0-9]+-*[A-Za-z0-9]+

Answer 1

You can use this regex:

#[A-Za-z0-9]+(-[A-Za-z0-9]+)*\b