Use of Bool in C
Bool in C
In this section we will discuss the use of bool in the C programming language.
The C programming language, as of C99, supports the use of boolean with the help of built-in -type _Bool. bool can be used in place of _Bool if stdbool.h header file is included.
_Bool is data type which was introduced in C99. the variables of _Bool only holds two value 0(false) and 1(true). When storing value in the _Bool data type 0 is stored when the input is 0 and for every other input 1 is stored. For example say we have input 2019 then 1 will be stored.
_Bool check = 2019;
printf("the output is %d",check);
the output is 1
As we can see even when the input is 2019 the output is 1.
We have another way of using boolean arithmetic in C Programming language which by using bool which is a macros in the stdbool.h header.
There are 4 macros in the header stdbool.h in the C Standard Library for the C programming language for a Boolean data type. This header was introduced in C99.
The macros as defined in the ISO C standard are :
- bool which expands to _Bool
- true which expands to 1
- false which expands to 0
- __bool_true_false_are_defined which expands to 1
printf("the value of x: %d",x );
printf("\nthe value of y: %d",y );
the value of x: 1
the value of y: 0