sub foo {
  my ($aChars, $ch) = @_;
  my $i=0;
  for (@$aChars) {
    return $i if $ch eq $_;
    $i++;
  };
}

my @aChars =('a','b','c','d');
print "c=", findChar(\@aChars, 'c'), "\n";
# outputs c=2

##</code><code>##

my $k='c';
my $i=0;

for (@aChars) { last if $k eq $_; $i++; };

print "$k=$i\n";
#also outputs c=2