Question

For an object it is

NSLog(@"some object %@", someObject);  

For decimal it is:

NSLog(@"some object %d", 2.33);  

What is it for a bool?

Answer 1

Treat it like an int:

NSlog(@"%d",yourBool)

… outputs 1 for YES and 0 for NO

If you want to get a YES/NO output use:

NSLog(@"%@", (yourBool ? @"YES" : @"NO"));

The reason, copy-pasted from objc.h:

#define YES             (BOOL)1
#define NO              (BOOL)0

PS: For decimals (floats) it’s not %d…. its:

NSLog(@"%f",2.33);