RegEx pattern any two letters followed by six numbers

Question

Please assist with the proper RegEx matching   Any 2 letters followed by any combination of 6 whole numbers    These would be valid   RJ123456 PY654321 DD321234  These would not DDD12345 12DDD123

User · Accepted Answer

a-zA-Z  2  d 6    a-zA-Z  2  means two letters  d 6  means 6 digits  If you want only uppercase letters  then    A-Z  2  d 6

User · Answer

Depending on if your regex flavor supports it  I might use    b A-Z  2  d 6  b      Ensure there are  word boundaries  on either side  or     lt   A-Z   A-Z  2  d 6     d    Ensure there isn t a uppercase letter before                                 and that there is not a digit after

User · Answer

You could try something like this    a-zA-Z  2  0-9  6    Here is a break down of the expression    a-zA-Z       Match a single character present in the list below                  A character in the range between    a    and    z                     A character in the range between    A    and    Z        2            Exactly 2 times  0-9          Match a single character in the range between    0    and    9        6            Exactly 6 times   This will match anywhere in a subject  If you need boundaries around the subject then you could do either of the following     a-zA-Z  2  0-9  6     Which ensures that the whole subject matches  I e there is nothing before or after the subject   or    b a-zA-Z  2  0-9  6  b   which ensures there is a word boundary on each side of the subject   As pointed out by  Phrogz  you could make the expression more terse by replacing the  0-9  for a  d as in some of the other answers    a-zA-Z  2  d 6

User · Answer

I depends on what is the regexp language you use  but informally  it would be     alpha    alpha    digit    digit    digit    digit    digit    digit     where   alpha      a-zA-Z  and   digit      0-9   If you use a regexp language that allows finite repetitions  that would look like     alpha   2   digit   6    The correct syntax depends on the particular language you re using  but that is the idea

User · Answer

Everything you need here can be found in this quickstart guide  A straightforward solution would be  A-Za-z  A-Za-z  d d d d d d or  A-Za-z  2  d 6    If you want to accept only capital letters then replace  A-Za-z  with  A-Z

[regex] RegEx pattern any two letters followed by six numbers

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