Perl keyword say is not working in version 5.14.4

问题

My Perl version is 5.14.4, but the function say is not working. What might be wrong?

回答1:

For backwards compatibility reasons, it's not available by default. You could use

CORE::say(...);          # Requires Perl 5.16.

but it's probably better to add one of the following:

use feature qw( say );   # Requires Perl 5.10.
use v5.10;               # All 5.10 features including "say".
use 5.010;               # Same as previous.
use v5.14;               # All 5.14 features including "say".
use 5.014;               # Same as previous.

This is documented.

来源：https://stackoverflow.com/questions/29888093/perl-keyword-say-is-not-working-in-version-5-14-4