for @list -> $a {
    # here $a is local'ized in the perl 5 sense
}

##</code><code>##

for @list {
    say $^a; # $^a is only available in this block
}

##</code><code>##

my $a;
for @list -> $=a {
    # $=a is the "reused" version of $a
}
# here $a has the last value of $=a