The difference between Boolean, Boolean, BOOL, and bool in iOS

The difference between Boolean, Boolean, BOOL, and bool in iOS

1. BOOL T1 =1;//true or False
2. BOOL t2 = 3;//yes or NO
3. Boolean t3 = 1; unsigned char type
4. boolean_t T4 = 1;//int type
5. Nsassert (t1,@ "bool T1 is NO");//Pass Test
6. Nsassert (t2,@ "BOOL T2 is NO");//Pass Test
7. Nsassert (t3,@ "Boolean T3 is NO");//Pass Test
8. Nsassert (t4,@ "boolean_t T4 is NO");//Pass Test

BOOL is of type int, bool B when b!=0 has b=true

BOOL is unsigned char type, BOOL B when b=1 has B=yes

Boolean is a char type

boolean_t is an int type

Note: As long as the value of the variable is not zero, the condition is established as the above type as a criterion.

The difference between Boolean, Boolean, BOOL, and bool in iOS