See the comments above, your statement is incorrect. for can just as easily iterate over a list as foreach (without an explicit iterator), they are completly interchangeable.

@a = ( 1, 2, 3, 4);
for(@a) {
    print;
}
print "\n";
foreach(@a) {
    print;
}
print "\n";

for($i=0; $i<@a; $i++) {
    print @a[$i];
} 
print "\n";
foreach($i=0; $i<@a; $i++) {
    print @a[$i];
} 
print "\n";
[download]

Results:

1234
1234
1234
1234
[download]