Objective-C 2.0 for ... in loop, using Fast Enumeration, looping through dictionary key-value pairs and values

loop.m

    NSDictionary *dictionary = @{
                                    @"hello" : @"world",
                                    @12 : @"foo",
                                    @123.456 : @56,
                                    @"how are you" : @1
                                };
    
    for (id key in dictionary) {
        NSLog(@"key is %@ and value is %@", key, [dictionary objectForKey:key]);
    }
    
    for (id v in [dictionary objectEnumerator]) {
        NSLog(@"value is %@", v);
    }