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Regex don't allow two zeros at the end of a number

I am trying to implement a number input field that will not allow if the number ends with two 0's, i.e. if i enter 23100 then it shouldn't accept it. I am using regex / ^ [0-9] * 00 $ / but this allows 123100.

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3 answers


you can use

/^(?!\d*00$)\d+$/


It will match

  • ^

    - beginning of line
  • (?!\d*00$)

    - negative result, which ensures that no 0 + digits with 00

    endings are allowed
  • \d+

    - one or more digits
  • $

    - end of line
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Updated now to use backtracks or waits.

^\d*(?:\d?[1-9]|[1-9]\d)$


Demo

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try it. (^\d+[1-9]+0{0,1}$)

This will work for numbers like

12 123 12310 etc.

any number with 2 or more 0 at the end does not match in this case

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