Question

I am inserting data from an iphone app to a server

 participant_id="1";
 NSString *post =[[NSString alloc] initWithFormat:@"participant_id=%@&question_id=%@&answer_text=%@&answer_option=%@",participant_id,question_id,answer_text,answer_option];

Using the above line with other code, Is it possible instead that NSString participant_id may pass int participant _id to server from this line

Answer 1

Sure, just use the %d or %u format specifier:

participant_id = 1 ;
NSString *post =[[NSString alloc] initWithFormat:@"participant_id=%d", participant_id];

See https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html for the full list.