returning multiple values

correct example:

Bool isDir;
 
// path is an NSString *
// &isDir means the address of the isDir variable
 
if([filemanager fileExistsAtPath:path isDirectory:&isDir] && !isDir){
  // do something - we have a valid file that is not a directory
}

along with this, remember that just creating a pointer doesn't create anything in memory - incorrect example:

Bool *isDir;
if([filemanager fileExistsAtPath:path isDirectory:isDir] && !isDir){
  // !! THIS WILL NOT WORK !!
}