Look to get number using regex from string

Question

Looking for a regex to get the number from a string.

My string could be:

abcd1
abcd01
abcd11

I tried this but it is not working: /\d+$/ and some others but they are not seems to be correct.

Is there any easy way to get the number from a string? ANd it will be at the end.

Why the slashes at the beginning and the end? C# is not JavaScript. — usr
– usr, Commented Dec 7, 2012 at 17:00

Justin Pihony · Accepted Answer · 2012-12-07 17:09:28Z

4

I believe you want this regex (without the beginning slashes as C# does not need that)

\d+$

To ignore leading 0

[1-9]\d*$

If you want to drop ALL leading 0's, it honestly would be easier to just cast your result to an Int32

edited Dec 7, 2012 at 17:09

answered Dec 7, 2012 at 16:58

Justin Pihony

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5 Comments

alice7 Over a year ago

I just tested and it is giving me the result except for this abcd01. Is there anyway to just get 1 instead of 01?

Esailija Over a year ago

@alice7 use (0|[1-9]\d*)$ then

Justin Pihony Over a year ago

Hamlet is ALMOST right if you want to ignore the leading 0's: [1-9]\d*$

Nick Over a year ago

@alice7 do you just want to drop leading zeros, or do you only want the last number? In your example above of abcd11 do you want 1 or 11?

alice7 Over a year ago

@Esailija: thanks it works. I tested with all the above and it works.

Hamlet Hakobyan · Accepted Answer · 2012-12-07 17:14:46Z

3

I think it is that you want. "Is there anyway to just get 1 instead of 01?" Yes, there is.

[1-9]\d*$

edited Dec 7, 2012 at 17:14

answered Dec 7, 2012 at 17:04

Hamlet Hakobyan

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2 Comments

Justin Pihony Over a year ago

Your answer will force two digits, change the + to a * and this will work

Justin Pihony Over a year ago

@Esailija You are right, that will only catch one leading 0. I updated my answer

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