regular expression (*, +)

[labmaster]

Hi,

I have a simple but complicated question on regular expression using star(*) and (+).

When I wanted to detect a floating number, I used [-+]?[0-9]+\.?[0-9]+ but found [-+]?[0-9]*\.?[0-9]+ is more popular in expert people.

In this expression, * was used in the decimal part but + used in the floating part.

In definition, * can exclude a character itself but + need to get the number definitely.

Can you give me wrong example for "[-+]?[0-9]+\.?[0-9]+" which can detect a number rightly by "[-+]?[0-9]*\.?[0-9]+ " ?

labmaster.

[Yamaeda · Accepted solution]

.14 will be detected by the 2nd but not the first.

I'd probably use * on the fractional part also.

/Y

[labmaster]

wow.. thanks. I understand it clearly