How can I extract a major and minor version number from the end of a string?

I’m trying to extract the CMS Tikiwiki version, but I have a problem extracting the version.
I’m able to extract only the first part of the number, example:

Version 15.0, I can extract only 15, but I want to extract 15.0.

if ($res=~ m/as of version (.+?)\./) {

  $version = $1;

 }

Sentences to extract version

The following list attempts to gather the copyright holders for Tiki as of version 15.0.

>Solution :

Try this,

if ($res =~ m/as of version (\d+(?:\.\d+))\./) {

If this is the end of the string you may want,

if ($res =~ m/as of version (\d+(?:\.\d+))\.$/) {

The pattern (\d+(?:\.\d+)) captures any digit followed by an optional grouping of . and one or more digits.