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 it's single line, you could specify that your match must happen at the end of the line, like this in .net ...

^\s*([0-9]{10})\z

That will accept 1234567890 but reject 12345678901.