boolean in C

In C, Boolean is a data type that contains two types of values, i.e., 0 and 1. Basically, the bool type value represents two types of behaviour, either true or false. Here, '0' represents false value, while '1' represents true value.
In C Boolean, '0' is stored as 0, and another integer is stored as 1. We do not require to use any header file to use the Boolean data type in C++, but in C, we have to use the header file, i.e., stdbool.h. If we do not use the header file, then the program will not compile.
```
#include <stdio.h>
#include <stdbool.h>

int main() {
  bool x = false;
  if(x){
    printf("x is true.");
  }
  else{
    printf("x is false.");
  }
}
```
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