What format specifier should be used for BOOL? [duplicate]

Question

Possible Duplicate:
Objective c formatting string for boolean?

What NSLog %-specifier should be used to literally see YES or NO when printing a BOOL?

Answer 1

BOOL var = YES;
NSLog(@"var = %@", (var ? @"YES" : @"NO"));

BOOL is merely an alias (typedef) for signed char.

The specifiers supported by NSLog are documented here.

Answer 2

Objective-C booleans (BOOL) are simply typedefs to signed char. Therefore, they are not objects, and aren't handled any differently from other primitive numbers. If you don't care about seeing YES and NO, you can simply print them out as you would any other number (with %d, for instance). If you would like to see YES and NO, you can follow Emile's suggestion.