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Asked: 2026-05-13T20:58:13+00:00

I have the following regular expression: ^[-+]?[\d{0,3},?\d{3}]*\.?\d+$ I am trying to support numbers of

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I have the following regular expression:

^[-+]?[\d{0,3},?\d{3}]*\.?\d+$

I am trying to support numbers of the following formats:

  • 1
  • -1
  • -1.00
  • 100,000

I am not concerned about scientific notation but my users may or may not enter in commas. The problem I am having is that the expression is matching:

  • 100,
  • 100,00

How can I have the expression indicate that if there is a comma then there must be three characters after it.

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1 Answer

  1. Editorial Team

    Try this regular expression:

    /^[-+]?(?:\d*|\d{1,3}(?:,\d{3})*)(?:\.\d+)?$/
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