C language #if, #elif, #else, #endif Pre-processor - Pre-processor Directives in C
Learn C - C tutorial - c language if elif else endif pre processor - C examples - C programs
C language #if, #elif, #else, #endif Pre-processor
- Every C program should pass through a Pre-processor before compilation.
- The preprocessor is a part of the compiler which performs preliminary operations to your code before the compiler.
Learn C - C tutorial - c language if elif else endif pre processor - C examples - C programs
Sample Code
#include <stdio.h>
#define ENG_US 1
#define ENG_UK 2
#define FRENCH 3
#define LANGUAGE ENG_UK
int main()
{
#if LANGUAGE==ENG_US
printf("Selected language is: ENG_US\n");
#elif LANGUAGE==ENG_UK
printf("Selected language is: ENG_UK\n");
#else
printf("Selected language is: FRENCH\n");
#endif
return 0;
}
Output
Selected language is: ENG_UK