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C Program to Generate Multiplication Table | c programming examples | c programming examples for practice

 

In this example, you will learn to generate the multiplication table of a number entered by the user.

To understand this example, you should have the knowledge of the following C programming topics:

C Programming Operators

C for Loop

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

Multiplication Table Up to 10

 

#include 

int main() {

  int n, i;

  printf("Enter an integer: ");

  scanf("%d", &n);

  for (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, the user input is
stored in the int variable n. Then, we use a for loop to print
 the multiplication table up to 10.

for (i = 1; i <= 10; ++i) {

  printf("%d * %d = %d \n", n, i, n * i);

}

The loop runs from i = 1 to i = 10. In each iteration of the loop, n * i is printed.

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

 

#include 

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

Here, we have used a do...while loop to prompt the user for a positive range.

// prompt user for positive range

do {

  printf("Enter the range (positive integer): ");

  scanf("%d", &range);

} while (range <= 0);

If the value of range is negative, the loop iterates again to ask the user to enter a positive number. Once a positive range has been entered, we print the multiplication table.

 


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