How to detect exact length in regex

Question

I have two regular expressions that validate the values entered.

One that allows any length of Alpha-Numeric value:

@\"^\\s*(?[A-Z0-9]+)         


        

Answer 1

If you are trying to match only numbers that are 10 digits long, just add a trailing anchor using $, like this:

^\s*(?:[0-9]{10})\s*$

That will match any number that is exactly 10 digits long (with optional space on either side).