




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 
#define PI 3.14
main() {
   printf("%f",PI);
}

Output:

3.140000





Let's see an example of #define to create a macro.

#include 
#define MIN(a,b) ((a)
Output:

Minimum between 10 and 20 is: 10













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