Register in Storage Class

code:

#include<stdio.h>
int main()
{

    register int count;
    for(count=1;count<=1000;count++)
    {

        printf("%d\n",count);
    }

//         int countn;
//    for(countn=1;countn<=1000;countn++)
//    {
//
//        printf("%d\n",countn);
//    }
    return 0;
}