gistfile1.c

#include <stdio.h>
    main()
        {
            long long int i,j,k,n=2000000,sum=2;
                int  count;
                  for(i=3;i<n;i++){
                      count=1;      // assume that it is prime
                        for(j=2;j<=sqrt(i);j++){
                                    if(i%j==0){
                                          count=0;   // it is not prime
                                         break;
                                    }  // end control flow
                        }  // end child loop
                                    if(count==1)
                                          sum=sum+i;
                  }  // end parent loop
                        printf("%lld\n",sum);
        }  // end main loop