C:\>perl -MCGI -e"die CGI->VERSION"
3.38 at -e line 1.

C:\>perl -MCarp -e"die Carp->VERSION"
1.04 at -e line 1.

C:\>perl -Mstrict -e"die strict->VERSION"
1.03 at -e line 1.

C:\>perldoc UNIVERSAL
...
 "VERSION ( [ REQUIRE ] )"
     "VERSION" will return the value of the variable $VERSION in the
     package the object is blessed into. If "REQUIRE" is given then it
     will do a comparison and die if the package version is not greater
     than or equal to "REQUIRE".

     "VERSION" can be called as either a class (static) method, an object
     method or a function.