RegEx for a 6 character long string that consists of four letters followed by 2 numbers

Question

I am able to get individual RegEx for each of the following conditions:

• string is 6 characters long
• first 4 characters are letters a-z
• last 2 characters are numbers

How do I create a RegEx that creates a match when ALL of these conditions are met?

For example, a valid match would be xqwl82

Answer 1

You could this regex

^[a-z]{4}d{2}$

If you need uppercase letters too

^[A-Za-z]{4}d{2}$

or with case insentive flag

^[A-Z]{4}d{2}$

1. ^ Beginning of string
2. $ end of string
3. [a-z]{4} Matches 4 letters
4. d{2} Matches 2 numbers