use 5.6.0;

##</code><code>##

$ perl555 -e 'use 5.6.0'    
syntax error at -e line 1, near "use 5.6"
Execution of -e aborted due to compilation errors.

##</code><code>##

$ perl555 -e 'require 5.6.0'
Can't locate 5.60 in @INC (@INC contains ...[snip]...) at -e line 1.

##</code><code>##

require 5.006;            # run-time

BEGIN { require 5.006; }  # compile-time

##</code><code>##

$ perl555 -e 'require 5.006'
Perl 5.006 required--this is only version 5.00505, stopped at -e line 1.