regex that checks if the string starts with two upper-case followed by numbers

Question

Hi Guys I need a regex that checks if the string starts with two upper-case followed by numbers:

Example: DE123456789

Thanx a lot of.

Answer 1

Literally:

^[A-Z]{2}\d+

1. ^ - start of the string
2. [A-Z] - an upper case letter
3. {2} - two of those
4. \d - a digit
5. + - one or more of those