About Lesson
2) C #define preprocessor
The #define preprocessor is also used to define constant.
C#define
The #define preprocessor directive is used to define constant or micro substitution. It can use any basic data type.
Syntax:
#define token value
Let’s see an example of #define to define a constant. #include <stdio.h>
#define PI 3.14
main() {
printf(“%f”,PI);
}
Output: 3.140000