Basic #11, for loops

LABEL for (EXPR; EXPR; EXPR) BLOCK

e.g.

for($i=0;$i<100;$i++){
.....
}

for($i=0, $j=0; $i<100;$i++,$j++){
....
}

LABEL foreach VAR (LIST) BLOCK
LABEL foreach VAR (LIST) BLOCK continue BLOCK

e.g.

for (@months){
print "$_\n";
}

foreach $key (keys %monthstonum){
print "Month $monthstonum{$key} is $key\n";
}