Scan from string does not find number

[Darin.K]

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For the original poster, you could expand the regex to include all floting point numbers by searching for regex [+-]?\d+[.]?\d*+(?:[eE][+-]?\d+)

This regex can be simplified to [Ee+-\d.]+

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The original RegEx of Stephen's is actually fairly common, and is meant to *only* match floating point numbers with or without the exponential notation.  The simplified version will match a lot of patterns that are not properly formed floating point numbers (E+e12+E-2ee).   Depends on how well you know the form of the input, and how much you trust it.

[ben64]

I agree, I assume the  numbers were well formed.

Ben64

[ben64]

I took a closer look at this regex [+-]?\d+[.]?\d*+(?:[eE][+-]?\d+)

Is there a purpose to the + between \d* and the non-capturing group? I think the non-cpaturing group should be optional if we want to match a number that doesn't have an exponent.

Ben64

[Darin.K]

In cleaning up the quote the final ? was chopped off of the regex so the non-capture group is optional.  I agree, no need for a greedy quantifier beforehand, no harm though.