Checking Perl version

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Checking Perl version by naChoZ (Curate) on Jul 08, 2003 at 13:00 UTC
`require 5.6.1;` [download] require perldoc. ~~ naChoZ updated: added ;	[reply] [d/l]
Re: Re: Checking Perl version by ajdelore (Pilgrim) on Jul 08, 2003 at 19:25 UTC
I would recommend using require 5.x over using $[. It is shorter, direct, and makes more sense when reading the code. Also, not to be pedantic, but I think a ; is needed: `require 5.6.1;` </ajdelore>	[reply] [d/l]
Re: Checking Perl version by TVSET (Chaplain) on Jul 08, 2003 at 13:13 UTC
You might be interested in perldoc perlvar. Search for "version" and you will find variables like `$]` and `$^V`. Leonid Mamtchenkov aka TVSET	[reply] [d/l] [select]
Re: Checking Perl version by bigj (Monk) on Jul 08, 2003 at 13:27 UTC
You can check the `$]` variable. Please read `perldoc perlvar` for details. It would look like: if ($] < 5.006001) { die "You don't have a current version of Perl"; } Greetings, Janek	[reply] [d/l] [select]
Re: Re: Checking Perl version by Anonymous Monk on Jul 08, 2003 at 14:22 UTC
thanks. This: `if ($] < 5.006001) { die "You don't have a current version of Perl"; }` [download] didnt work for me for some reason. I checked perldocs and it seems this is the way to do it but for some reason it doesnt check my perl version.	[reply] [d/l]
Re: Re: Re: Checking Perl version by talexb (Chancellor) on Jul 08, 2003 at 15:35 UTC
What does `perl -v` show? That should tell you what's going on. --t. alex Life is short: get busy!	[reply] [d/l]
Re: Checking Perl version by QwertyD (Pilgrim) on Jul 09, 2003 at 04:56 UTC
`use 5.6.1;` if you want a check at compile time, `require 5.6.1;` if you want a check at run time. After it's Turing complete, everything else is just syntactic sugar.	[reply] [d/l] [select]
Re: Checking Perl version by William G. Davis (Friar) on Jul 09, 2003 at 06:51 UTC
`eval { require 5.6.1; }; warn "You do not have the current version of perl." if ($@);` [download] Although if you plan on exiting, you might as well just do: `use 5.6.1;` [download] or: `require 5.6.1;` [download] And let Perl do the rest of the work (it die()'s if the verion of Perl on that machine is less than the one you specify). (BTW, I believe 5.8.x is the "current" version of Perl, not 5.6.1).	[reply] [d/l] [select]