Regular expression, How to allow combination of dot (period) and letters?

Question

I want to allow (.) and (a-zA-Z) letters and _ and - , I have some problems with the (.) ,

Any idea ?

Thanks in advance ,

Ish

Answer 1

As everyone already said, if you enclose a set of characters (no need to escape in this situation) in square brackets, you are saying: "please allow these characters I'm putting inside. I found a reference video for you: Skip to 22-23 min