Javascript regular expression to validate decimal(16,9)

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Hi friends,
I want to write regex to validate textbox for decimal value (16,9).

I tried following regex:

/^(\d{1,16}\.?\d{1,9}|\{1,16})$/

It handles values with 1-16.1-9 digits.

Problem is when I just enter value like 12345678901234567 without decimal, it is not validating. It should actually invalidate, since it is taking 17 digit.

Any idea what is going wrong?

Thanks in advance

Posted 7-Jan-15 23:12pm

dhage.prashant01

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jaket-cp 8-Jan-15 5:16am

try removing the ?

dhage.prashant01 8-Jan-15 5:26am

My requirement is value can be int or decimal.
If I remove '?', then the it invalidates the int value.

jaket-cp 8-Jan-15 5:31am

At a glance I read your pattern as being either the decimal number or integer number.
Didn't test or anything :)

Praveen Kumar Upadhyay 8-Jan-15 5:28am

How this will validate, you regex is simply saying that before decimal it should be 16 character only.

dhage.prashant01 8-Jan-15 5:30am

My requirement is

1234567890123456 - valid
12345678901234567- invalid

1.123456789 - valid
1.1234567890 - invalid

12345678901234567.1 - invalid

Praveen Kumar Upadhyay 8-Jan-15 5:32am

So 12345678901234567 is showing invalid na?

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OriginalGriff · Answer 1 · 2015-01-07T23:16:00

Solution 1

Try:

^\d{1,16}(\.\d{1,9})?$

Posted 7-Jan-15 23:16pm

OriginalGriff

Comments

dhage.prashant01 8-Jan-15 5:44am

It worked, TQ :)
Now the problem is value can be 0000000000.00
How can we handle below
0.0 or 1.0 - Valid
01.0 - Invalid

OriginalGriff 8-Jan-15 5:58am

You could modify it to have a non-leading zero, but it gets messy:
^(0|[1-9]\d{0,15})(\.\d{1,9})?$

To be honest, I'd probably do this by parsing the data to a number and checking that if this gets much more complex.

CPallini 8-Jan-15 5:50am

5.