C Program to Generate Multiplication Table

The program below takes an integer input from the user and generates the multiplication tables up to 10.

Multiplication Table Up to 10 :

Program :

#include <stdio.h>
int main() {
  int n;
  printf("Enter an integer: ");
  scanf("%d", &n);

  for (int i = 1; i <= 10; ++i) {
    printf("%d * %d = %d \n", n, i, n * i);
  }
  return 0;
}

Output :

Enter an integer: 9
9 * 1 = 9 
9 * 2 = 18 
9 * 3 = 27 
9 * 4 = 36 
9 * 5 = 45 
9 * 6 = 54 
9 * 7 = 63 
9 * 8 = 72 
9 * 9 = 81 
9 * 10 = 90

Here's a little modification of the above program to generate the multiplication table up to a range (where range is also a positive integer entered by the user).

Multiplication Table Up to a range :

Program :

#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: 16
Enter the range (positive integer): -6
Enter the range (positive integer): 6
16 * 1 = 16 
16 * 2 = 32 
16 * 3 = 48 
16 * 4 = 64 
16 * 5 = 80 
16 * 6 = 96