CODEWITHSUNDEEP
regex
techq
techq

Reputation: 85

number validaiton - javascript regex

I've come up with this regular expression to validate a number which can have Maximum length-13 (including decimal points),Maximum no of decimal points-3,Maximum length of a whole number-12.

^(\d{1,12}([.]\d{1,1})?|\d{1,11}([.]\d{1,2})?|\d{1,10}([.]\d{1,3})?)$

Could anyone tell me if my approach is correct or give me a better solution?

Upvotes: 3

Views: 78

Answers (1)

Tibrogargan
Tibrogargan

Reputation: 4603

This would also work:

^(?=.{1,13}$)(\d{1,12})(\.\d{1,3})?$

Uses positive look ahead to match the entire string length is ok. Then it uses a group to match from 1 - 12 digits Then there's an optional group to match a decimal followed by 1-3 digits.

Edited: Simplified since the rules don't allow a 13 digit integer-part

Upvotes: 3

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