I want to extract version number from string.
a string = "Tale: The Secrets 1.6"
b string=" The 34. Mask 1.6.98";
So for a version number is 1.6 and for b is 1.6.98
\d+(\.\d+)+
\\d+
: one or more digits \\.
: one point (\\.\\d+)+
: one or more occurences of point-digits
Will find
2.5
3.4.567
3.4.567.001
But will not find
12
3.
.23
If you want to exclude decimal numbers like 2.5
and expect a version number to have at least 3 parts, you can use a quantifier like this
\d+(\.\d+){2,}
After the comma, you can specify a maximum number of ocurrences.
Try:
Regex pattern = new Regex("\d+(\.\d+)+");
Match m = pattern.Match(a);
string version = m.Value;
You can write
[0-9]+(\.[0-9]+)+$
This should match the format. The $
is for matching at the end, can be dropped if not needed.
版本号是指任何散布点的数字序列吗?
\d+(\.\d+)+
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