jquery input validation regular expression

Question

I have an input which can accept a combination of data in this format:

dddd.nnnn

where d is an uppercase letter and n is a digit.

In some cases the initial uppercase letters could be 2, 3 or 4 in length. Then a . (point) can be entered, after which only numbers (0 - 9) can be entered.

Some sample entries are as follows

GHD.23
GH.235
EFF.1234

Can this be done by combining Regular Expressions?

Avinash Raj · Accepted Answer · 2014-09-18 17:01:39Z

7

Your regex would be,

^[A-Z]{2,4}\.\d+$

DEMO

Explanation:

^ Asserts that we are at the start.
[A-Z]{2,4} Allows 2 or 3 or 4 uppercase letters.
\. A literal dot.
\d+ One or more digits.
$ Asserts that we are at the end.

answered Sep 18, 2014 at 17:01

Avinash Raj

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