Objective-C formatting string for boolean?

Question

What formatter is used for boolean values?

EDIT:

Example: NSLog(@\" ??\", BOOL_VAL);, what is ?? ?

Answer 1

One way to do it is to convert to strings (since there are only two possibilities, it isn't hard):

NSLog(@" %s", BOOL_VAL ? "true" : "false");

I don't think there is a format specifier for boolean values.