Regex array of number

Question

I have a problem with regex and need your help. I want to check my string is correct or incorrect. First and last is a number, only number and comma after it. No space inside 2 numbers.

Ex:

1,2,3,49,5 this is correct
1,2,3,45, this is incorrect
,12,4,2,67 this is incorrect
1,2 3,4,5,6 this is incorrect

csharpbd · Answer 1 · 2018-06-27T05:28:45.383

0

Please check below regex to solve your problem.

Regex: ^[0-9]+([0-9,])+[0-9]+$

^[0-9]+ is for start with one or more number

[0-9]+$ is for end with one or more number

([0-9,])+ is for one or more number with comma

Please check the output in Regex101

Update:

Please check the updated regex: ^(\d+,)+\d+$

^(\d+,)+ is for one or more number with comma and this will handle first number with comma

\d+$ is for end with one or more number

Please check the updated output in Regex101

edited Jun 27 '18 at 05:28

answered Jun 27 '18 at 05:09

csharpbd

3,786
4
23
32

try 3+ digit number as an input. Your expression doesn't fail. But fails with 1 and 2 digit number. – Eduard Jun 27 '18 at 05:19
Also matches "1,,,,,1". So.. – Eduard Jun 27 '18 at 05:26
Please check the updated solution. – csharpbd Jun 27 '18 at 05:30
the same Sedo's problem :) – Việt Nguyễn Văn Jun 27 '18 at 06:08

Eduard · Answer 2 · 2018-06-27T05:16:29.097

0

^(?:\d+,)*\d+$

(?:\d+,)* - gets matches like "0," "00," "000," ... or empty

\d+ - gets last number as "0" "00" "000"

edited Jun 27 '18 at 05:16

answered Jun 27 '18 at 05:11

Eduard

475
4
14

Works for single element array – Eduard Jun 27 '18 at 05:19
thank you so much, you are right. – Việt Nguyễn Văn Jun 27 '18 at 06:08

Regex array of number

2 Answers2