C #define

The #define preprocessor directive is used to define constant or micro substitution. It can use any basic data type.

Syntax:

Let’s see an example of #define to define a constant.

Output:

3.140000

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

 #include  #define MIN(a,b) ((a)<(b)?(a):(b)) void main() {    printf(“Minimum between 10 and 20 is: %dn”, MIN(10,20));   } 

Output:

Minimum between 10 and 20 is: 10

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