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Regular expression to accept a capital letter should accept a number instead

I have a regular expression which should accept a number in the final M position, but my customer has a letter instead (capital M).

CNTCST79L20H50MG

The regular expression is:

^[A-Za-z]{6}[0-9]{2}[A-Za-z]{1}[0-9]{2}[A-Za-z]{1}[0-9]{3}[A-Za-z]{1}$

How could I modify the regular expression so it will accept CNTCST79L20H50MG, instead of requiring a number?

is

^[A-Za-z]{6}[0-9]{2}[A-Za-z]{1}[0-9]{2}[A-Za-z]{1}[0-9]{2}[A-Za-z]{2}$

correct as a regular expression for the code

CNTCST79L20H50MG?

Edit:

NOTE Unfortunately, the final regular expression should accept both cases.

Solution

  • Yes, that is correct. You can see it working here: https://regex101.com/r/rHBFnA/1

    Updated for your update :)

    You can inidicate both letters and numbers in the character class:

    ^[A-Za-z]{6}[0-9]{2}[A-Za-z]{1}[0-9]{2}[A-Za-z]{1}[0-9]{2}[A-Za-z0-9][A-Za-z]$

    That matches both of these:

    CNTCST79L20H50MG
CNTCST79L20H505G

    But not this:

    CNTCST79L20H5057

    https://regex101.com/r/rHBFnA/4