Regex to match string not ending with pattern

Question

I try to find a regex that matches the string only if the string does not end with at least three \'0\' or more. Intuitively, I tried:

.*[^0]{3,}$
         


        

Answer 1

You can try using a negative look-behind, i.e.:

(?

Tests:

Test  Target String   Matches
1     654153640       Yes
2     5646549800      Yes   
3     848461158000    No
4     84681840000     No
5     35450008748     Yes   

Please keep in mind that negative look-behinds aren't supported in every language, however.