Recursive Main Function Calling

 #include <stdio.h>  
 main()  
 {  
         static int var=5;  
         printf("%d", var--);  
         if(var)  
                 main();  
 }  
 Answer: 5 4 3 2 1  

 Explanation:  
 When static storage class is given, it is initialized once. The change in the value of a static variable is retained even between the function calls.   
 Main is also treated like any other ordinary function, which can be called recursively.