iPhone app Update Vs new version

Question

Let\'s say I have an existing IOS app live on Appstore which is version 1.0

Now I make some changes to the app and want to submit back.

Are there 2 separate

Answer 1

NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];
NSLog(@"version is%@",version);