@array = qw(hi hello howdy);
@array = grep {!/^hello$/} @array;
print join "\n", @array;

##</code><code>##

@array = qw(hi hello howdy);
for (@array) {
    if ($_ eq 'hello') {
        undef $_;
        next;
    }
    # Process list elements
}
@array = grep {defined} @array;
print join "\n", @array;