Question

program that reads numbers from scanf (keyboard) and then sums them, stopping when 0 has been entered. Construct three versions of this program, using the while, do-while, and for loops.

Answer 1

Answer:

Explanation:

I'm going to write three examples in C language:

int main() {

   int n, i, sum = 0;

   printf("Enter the number: ");

   scanf("%d", &n);

   for (i = 1; i <= n; ++i) {

       sum += i;

   }

   printf("Sum = %d", sum);

   return 0;

}

int main() {

   int n, i, sum = 0;

   printf("Enter a number: ");

   scanf("%d", &n);

   i = 1;

   while (i <= n) {

       sum += i;

       ++i;

   }

   printf("Sum = %d", sum);

   return 0;

}

int main() {

   int n, i, sum = 0;

   do {

       printf("Enter a number: ");

       scanf("%d", &n);

   } while (n <= 0);

   for (i = 1; i <= n; ++i) {

       sum += i;

   }

   printf("Sum = %d", sum);

   return 0;

}