#define directive

#define directive :

#define is used for defining the constant value. In C language it is a directive which allows the definition of macros within source code.

Syntax :

Code:

#define cname value

#define age 10

eg.

Code:

  #include <stdio.net>
      #define name "24x7servermanagement.com"
      #define age 10

      int main()
      {
           printf("%s is over %d years.\n", name, age);
           return 0;
      }

output :
24x7servermanagement.com is over 10 years