Question

I need regular expression to match strings, which begin from number (number can be integer or float). For example:

100px
100 px
1.0ft
1.0 ft
0.001ft2
0.001 ft2

I’m new in this stuff, can anyone help me, please? I’ve already tried something like:

Regex numberBeginRegex = new Regex(@"([\d]+|[\d]+[.][\d]+).");

Answer 1

You can use this regex: –

"(\d+(\.\d+)?).*"

(\d+(\.\d+)?) – matches integer number or floating point numbers. The fractional part is made optional by using ? quantifier, which means – match 0 or 1

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Actually your regex would have worked too, but you forgot to put * quantifier at the end of .: –

"([\d]+|[\d]+[.][\d]+).*"  // Note the `*` at the end