C Program to Generate Multiplication Table Up to a range

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

  int n, i, range;
  printf("Enter an integer: ");
  scanf("%d", &n);

  // prompt user for positive range
  do {
    printf("Enter the range (positive integer): ");
    scanf("%d", &range);
  } while (range <= 0);

  for (i = 1; i <= range; ++i) {
    printf("%d * %d = %d \n", n, i, n * i);
  }

  return 0;
}

Output

Enter an integer: 12
Enter the range (positive integer): -8
Enter the range (positive integer): 8
12 * 1 = 12 
12 * 2 = 24 
12 * 3 = 36 
12 * 4 = 48 
12 * 5 = 60 
12 * 6 = 72 
12 * 7 = 84 
12 * 8 = 96