C Program to Print Multiplication Table

Use a for loop in C to print the multiplication table by multiplying the given number with loop counters and printing the result, like for(int i=1; i<=10; i++) printf("%d x %d = %d\n", num, i, num*i);.

Examples

Input5

Output5 x 1 = 5 5 x 2 = 10 5 x 3 = 15 5 x 4 = 20 5 x 5 = 25 5 x 6 = 30 5 x 7 = 35 5 x 8 = 40 5 x 9 = 45 5 x 10 = 50

Input1

Output1 x 1 = 1 1 x 2 = 2 1 x 3 = 3 1 x 4 = 4 1 x 5 = 5 1 x 6 = 6 1 x 7 = 7 1 x 8 = 8 1 x 9 = 9 1 x 10 = 10

Input0

Output0 x 1 = 0 0 x 2 = 0 0 x 3 = 0 0 x 4 = 0 0 x 5 = 0 0 x 6 = 0 0 x 7 = 0 0 x 8 = 0 0 x 9 = 0 0 x 10 = 0

How to Think About It

To print a multiplication table, first get the number from the user. Then, use a loop that runs from 1 to 10. In each loop step, multiply the number by the loop counter and print the result in a readable format.

Algorithm

1

Get the number input from the user.

2

Start a loop from 1 to 10.

3

In each iteration, multiply the input number by the loop counter.

4

Print the multiplication expression and result.

5

End the loop after 10 iterations.

Code

c

#include <stdio.h>

int main() {
    int num, i;
    printf("Enter a number: ");
    scanf("%d", &num);
    for(i = 1; i <= 10; i++) {
        printf("%d x %d = %d\n", num, i, num * i);
    }
    return 0;
}

Output

Enter a number: 5
5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45
5 x 10 = 50

Dry Run

Let's trace the program with input 3 through the code.

1

Input number

User enters 3, so num = 3

2

Start loop

i starts at 1

3

Calculate and print

Print 3 x 1 = 3

4

Increment loop

i becomes 2

5

Repeat calculation

Print 3 x 2 = 6

6

Continue until i=10

Prints up to 3 x 10 = 30

i	num	num * i	Output line
1	3	3	3 x 1 = 3
2	3	6	3 x 2 = 6
3	3	9	3 x 3 = 9
4	3	12	3 x 4 = 12
5	3	15	3 x 5 = 15
6	3	18	3 x 6 = 18
7	3	21	3 x 7 = 21
8	3	24	3 x 8 = 24
9	3	27	3 x 9 = 27
10	3	30	3 x 10 = 30

Why This Works

Step 1: Getting user input

The program uses scanf to read the number from the user and store it in num.

Step 2: Looping from 1 to 10

A for loop runs from 1 to 10, representing the multiplier in the table.

Step 3: Printing each multiplication line

Inside the loop, the program multiplies num by the loop counter i and prints the result in the format num x i = product.

Alternative Approaches

Using while loop

c

#include <stdio.h>

int main() {
    int num, i = 1;
    printf("Enter a number: ");
    scanf("%d", &num);
    while(i <= 10) {
        printf("%d x %d = %d\n", num, i, num * i);
        i++;
    }
    return 0;
}

This uses a while loop instead of for loop; functionally the same but shows different loop style.

Printing table for fixed number 7

c

#include <stdio.h>

int main() {
    int i;
    for(i = 1; i <= 10; i++) {
        printf("7 x %d = %d\n", i, 7 * i);
    }
    return 0;
}

This prints the table for number 7 without user input, useful for fixed tables.

Complexity: O(1) time, O(1) space

Time Complexity

The loop runs exactly 10 times, so time is constant O(1), independent of input size.

Space Complexity

Only a few variables are used, so space is constant O(1).

Which Approach is Fastest?

All approaches use simple loops with fixed iterations, so performance differences are negligible.

Approach	Time	Space	Best For
For loop with user input	O(1)	O(1)	Flexible input and clear structure
While loop with user input	O(1)	O(1)	Alternative loop style for beginners
Fixed number without input	O(1)	O(1)	Quick fixed table printing