title: how to remove () charracter
body: <p>when i convert my array by following method , it adds () charracter.</p>
  
  <p>i want to remove the () how can i do it..</p>
  
  <pre><code>NSMutableArray *rowsToBeDeleted = [[NSMutableArray alloc] init];
  
  NSString *postString = 
  [NSString stringWithFormat:@"%@", 
  rowsToBeDeleted];
  
  int index = 0;
  
  for (NSNumber *rowSelected in selectedArray)
  {
    if ([rowSelected boolValue])
    {
      profileName = [appDelegate.archivedItemsList objectAtIndex:index];
      NSString *res = [NSString stringWithFormat:@"%d",profileName.userID];
      [rowsToBeDeleted addObject:res];
    }
    index++;
  }
  </code></pre>
  
  <p>UPDATE - 1
  when i print my array it shows like this</p>
  
  <p>(
      70,
      71,
      72
  )</p>