boolean.c

#include <stdio.h>
#include <stdbool.h>

int main()
{
    // boolean, bool is a data type that is either true or false
    // include the header file stdbool.h

    // 1 used to represent the true.
    // 0 used to represent the false.
    // eg: bool isOnline = 1; means the value is true.

    bool isOnline = true;
    bool isStudent = true;
    bool forSale = false;

    // printf("%d", isOnline);

    if (isOnline)
    {
        printf("You are online.\n");
    }
    else
    {
        printf("You are offline.\n");
    }

    if (isStudent)
    {
        printf("You are a student.\n");
    }
    else
    {
        printf("You are not a student.\n");
    }

    if (forSale)
    {
        printf("Item is for sale.\n");
    }
    else
    {
        printf("Item is not for sale.\n");
    }

    return 0;
}