Regex to check the data entered into the field contains only numbers

Question

I'm using a field with string datatype, I want add validation to that field which will check if the string entered into the field contains only numbers, please help me with the regex?

Rajesh Omanakuttan · Answer 1 · 2013-09-11T19:47:00.593

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You can use the below given pattern for checking:

^(0|[1-9][0-9]*)$

If it returns true, it means that there are only digits inside the field, otherwise not.

edited Sep 11 '13 at 19:47

answered Sep 11 '13 at 19:18

Rajesh Omanakuttan

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score 1 · Accepted Answer · edited May 23 '17 at 11:50

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I'd check if \D+ returns a match. If so, there's at least one element that isn't a digit. Also, Test if string is a number in Ruby on Rails gives some answers without using regular expressions.

edited May 23 '17 at 11:50

Community

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answered Sep 11 '13 at 11:41

weeska

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The above is not correct. E.g., if the pattern is like "1 2", because it will return true for white spaces also. – Rajesh Omanakuttan Sep 11 '13 at 20:15
But that's what's expected? – weeska Sep 11 '13 at 20:26

Regex to check the data entered into the field contains only numbers

2 Answers2