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Asked: 2026-05-18T04:33:00+00:00

Is there a regex to match a string of increasing contiguous numbers, e.g. 123,

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Is there a regex to match a string of increasing contiguous numbers, e.g. 123, 56789, etc?
I don’t think it can be in regex but worth checking with folks here.

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1 Answer

  1. Editorial Team
    ^(?:0(?=1|$))?(?:1(?=2|$))?(?:2(?=3|$))?(?:3(?=4|$))?(?:4(?=5|$))?(?:5(?=6|$))?(?:6(?=7|$))?(?:7(?=8|$))?(?:8(?=9|$))?(?:9$)?$

    Result: http://rubular.com/r/JfJJ6ntEQG

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