Regular expression to validate a string in a specific format

Question

Can someone please help me put together a regular expression to validate an alphanumeric string in a specific format.

The first character must be a letter, and the next 6 characters are numbers ... for example, x279833 or X279833 are valid.

This is what I came up with - ^ [A-Za-z] {1} [0-9] {6} $

considers

Answer 1

Yours should work fine (you edited it after I wrote this answer), but {1}absolutely not needed. You can shorten it a bit to use \dinstead of [0-9].

If you want the entire string to be in this format, use:

^[a-zA-Z]\d{6}$

Answer 2

- :

^[a-zA-Z]\d{6}$

• [a-zA-Z] -
• \d char
• {6} 6 , 6

Answer 3

, , , , . , . - :

^[[:alpha:]]\d{6}$