I have the following regex pattern:
"[A-Z]{6,6}[A-Z2-9][A-NP-Z0-9]([A-Z0-9]{3,3}){0,1}"
and I want to validate a string with the following conditions
However, the above pattern is not working. What needs to be changed?
Use following regular expression:
^[A-Z]{6}[A-Za-z0-9]{2}([A-Za-z0-9]{3})?$
First 6 characters must all be uppercase letters (^ means that following pattern should match at the start of the string):
^[A-Z]{6}
Now there should be 2 or 5 more alphanumeric characters; 2 alphanumeric chracters should come anyway:
[A-Za-z0-9]{2}
and 3 after that is optional (?: 0 or 1 match of the preceding pattern, $ means that preceding pattern should match at the end of the string):
([A-Za-z0-9]{3})?$
Using ^ and $ together (^PATTERN$), the pattern should match the whole string instead of the substring.
^ means that that part of the patterns must be at the start of the target string (anchored to it's start), and that $ anchors the other end to the end of the string in the same way, so that this pattern must represent the whole target string.
^, $.The expression should be:
^[A-Z]{6}([A-Za-z0-9]{2}|[A-Za-z0-9]{5})$
