boolExample.m

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        BOOL isRaining = true;
        
        if(isRaining) {
            printf("Get Umbrellla");
        }
        else {
            printf("The sky is clear");
        }
        printf("\n");
    }
    return 0;
}