Regex for validating decimal number with fixed range

Question

I require a regex to validate fixed range decimal numbers e.g. 1234.1234 - valid, 4444.1234 - valid 123.123 - invalid, 1234.123 - invalid

The number 4 digit before decimal and 4 digit after decimal only valid. I'm currently uses this regex - /^\S((\d{4})((\.\d{4})?))$/ but this not satisfies me.

why regex? it might be both faster and safer to just parse the number and check the range using numerical comparison. — Sebastian S
– Sebastian S, Commented Jul 15, 2015 at 7:15

vks · Accepted Answer · 2015-07-15 07:13:22Z

2

^\d{4}(\.\d{4})?$

This should do it for you.Use

^[1-9]\d{3}(\.\d{4})?$

If you dont want to match 0234.1234

answered Jul 15, 2015 at 7:13

vks

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Vilas Over a year ago

I modified your regex - ^\d{4}(\.\d{4})?$ to new - ^\d{4}\.\d{4}$ for matching only the number 4 digit before decimal and 4 digit after decimal. I think this is correct one. what is your suggestion?

anubhava · Accepted Answer · 2015-07-15 07:12:55Z

0

You can use this regex:

/^\d{4}(?:\.\d{4})?$/

This will match 1234 or 1234.5678 as valid matched.

RegEx Demo

answered Jul 15, 2015 at 7:12

anubhava

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