Question

I need to verify input which is like en-US or en-us or ar-AE
I have searched net and found it bit difficult to understand and create one regular expressing on string which is no more than 5 characters in length and should be case in-sensitive.

I created one [a-z][a-z][-][a-z][a-z] this one works fine but it doesn’t check the length
it will match en-USXYZ also

Regards

Answer 1

You use ^ and $ to specify the start and end of the string.

^[a-z][a-z]-[a-z][a-z]$

Or using multiplier:

^[a-z]{2}-[a-z]{2}$

You would also have to include the A-Z interval for upper case characters, unless you have specified case insensetivity for the Regex object:

^[A-Za-z]{2}-[A-Za-z]{2}$