Hi Srinivasan

If your main class is returning interger you will put int in front of main() class as follows : int main() But if your code is not returning anything you need to put void in front of main() as given in below code :

#include "stdio.h"

void main(){

int i;

static int count;

for(i=NULL;i<=5;){

count++;

i+=2;

}

printf("%d",count);

}