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 int x,y,toplam,i;
   toplam=0;

   printf("Baslangic sayisini giriniz\n");scanf("%d",&x);
   printf("Bitis sayisini giriniz\n");scanf("%d",&y);
   for (i=x ;i<=y;i++)
    {
        toplam=toplam + i;
    }
    printf("%d",toplam);