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Editorial Team
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Asked: 2026-05-25T12:30:59+00:00

I am unable to find a Unicode supported isNumeric() function for javaScript and VBScript.

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I am unable to find a Unicode supported isNumeric() function for javaScript and VBScript. The functions are there, but are not unicode supported.

Even if there are no Unicode suported versions, then are there any API in both languages supporting isNumeric() or isDigit() functionality?

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1 Answer

  1. Editorial Team

    I have come upon the same problem a couple of weeks ago, and the solution I used was to check my character code against the unicode char code ranges that may define a digit.

    Here they are (the ranges come from PERL sources, as they already did the work!!):

    var isDigit = function(ch)
{
  var iCode = ch.charCodeAt(0)
  return ( 0x0030 <= iCode && iCode <= 0x0039 )
      || ( 0x0660 <= iCode && iCode <= 0x0669 )
      || ( 0x06F0 <= iCode && iCode <= 0x06F9 )
      || ( 0x0966 <= iCode && iCode <= 0x096F )
      || ( 0x09E6 <= iCode && iCode <= 0x09EF )
      || ( 0x0A66 <= iCode && iCode <= 0x0A6F )
      || ( 0x0AE6 <= iCode && iCode <= 0x0AEF )
      || ( 0x0B66 <= iCode && iCode <= 0x0B6F )
      || ( 0x0BE6 <= iCode && iCode <= 0x0BEF )
      || ( 0x0C66 <= iCode && iCode <= 0x0C6F )
      || ( 0x0CE6 <= iCode && iCode <= 0x0CEF )
      || ( 0x0D66 <= iCode && iCode <= 0x0D6F )
      || ( 0x0E50 <= iCode && iCode <= 0x0E59 )
      || ( 0x0ED0 <= iCode && iCode <= 0x0ED9 )
      || ( 0x0F20 <= iCode && iCode <= 0x0F29 )
      || ( 0x1040 <= iCode && iCode <= 0x1049 )
      || ( 0x17E0 <= iCode && iCode <= 0x17E9 )
      || ( 0x1810 <= iCode && iCode <= 0x1819 )
      || ( 0x1946 <= iCode && iCode <= 0x194F )
      || ( 0x19D0 <= iCode && iCode <= 0x19D9 )
      || ( 0xFF10 <= iCode && iCode <= 0xFF19 )
      || ( 0x104A0 <= iCode && iCode <= 0x104A9 )
      || ( 0x1D7CE <= iCode && iCode <= 0x1D7FF )
}

    By example, in Tamil, the character code for “one” is 0x0BE7, cf. http://www.fileformat.info/info/unicode/char/BE7/index.htm, and you can see it is part of the range 0x0BE6 => 0x0BEF so it’s a-ok.

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