Regular expression for characters after '.'

Question

I need to detect following format when I enter serial number like

CK123456.789

I used Regex with pattern of

^(CV[0-9]{6}\.[0-9]{3}

to match but if I enter

CK123456.7890

it still able to proceed without flagging error. Is there a better regular expression to detect the trailing 3 digits after '.'?

`^(CK\d*)\.\d*`. Change `*` to `+` or keep it, or change it to an indicator for amount of characters, depending what you need. — devRicher, Jan 20 '17 at 08:14
`\d` also matches other characters, so be careful if you change to that. — Bathsheba, Jan 20 '17 at 08:16
Why use regex, just search for the '.' and check if next symbols are numbers and >=3 — mybirthname, Jan 20 '17 at 08:17
I hope you noticed the difference between `CK` and `CV` in your question. — MakePeaceGreatAgain, Jan 20 '17 at 08:31

Bathsheba · Answer 1 · 2017-01-20T08:28:16.657

0

Depending on how you use the regular expression matcher, you might need to enclose it in ^...$ which forces the pattern to be the whole string, i.e.

^CK[0-9]{6}\.[0-9]{3}$ (Note the CK prefix).

I've also removed your leading (mismatched) parenthesis.

edited Jan 20 '17 at 08:28

answered Jan 20 '17 at 08:14

Bathsheba

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I have used your suggested method but still not working – user1972656 Jan 20 '17 at 08:21
Hum. It should do. Try `^(CV[0-9]{6}\.[0-9]{3})$` – Bathsheba Jan 20 '17 at 08:21
Did you want to match CV, CK, or both? – Bathsheba Jan 20 '17 at 08:23
sorry i meant CK. Ultimately the system should flag an error if I enter CK123456.7890 – user1972656 Jan 20 '17 at 08:25
OK, I've amended the answer. – Bathsheba Jan 20 '17 at 08:28
great! it is working now..thanks alot – user1972656 Jan 20 '17 at 08:57

Regular expression for characters after '.'

1 Answers1