Before writing a one-liner, try writing the code as a .pl file with 
use strict;
use warnings;

[download]
Your code actually does give an output: 
C:\....\Projects>perl -wE "@a=1..9; $i=0; say @a[$i..($i+=3)-1] while 
+$i<@a"




C:\....\Projects>perl>

[download]
Those blank lines are "output".

In reply to Re: Strange aliasing(?) when modifying variable in range operator by Marshall
in thread Strange aliasing(?) when modifying variable in range operator by vr

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