What's the difference between bool and BOOL?

Question

I think there are two boolean type we can use bool and BOOL. What's the difference between those two?

bool contains true and false; BOOL contains TRUE and FALSE, can they be interchangeable?

score 6 · Answer 1 · edited Sep 24 '13 at 14:34

6

enter image description here Mattt has written a blog post about this:

Objective-C defines BOOL to encode truth value. It is a typedef of a signed char, with the macros YES and NO to represent true and false, respectively.

edited Sep 24 '13 at 14:34

John Topley

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answered Sep 24 '13 at 14:32

CarlJ

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score 2 · Answer 2 · edited May 23 '17 at 12:28

2

bool is the datatype defined in C99.

BOOL is defined in Objective-C as typedef signed char BOOL.

Check out this Thread

edited May 23 '17 at 12:28

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answered Sep 24 '13 at 14:32

Rahul Tripathi

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What's the difference between bool and BOOL?

2 Answers2