JavaScript Program to Print Multiplication Table

Use a for loop in JavaScript to print a multiplication table, for example: for(let i=1; i<=10; i++){ console.log(`${num} x ${i} = ${num*i}`); } where num is the number for which you want the table.

Examples

Inputnum = 2

Output2 x 1 = 2 2 x 2 = 4 2 x 3 = 6 2 x 4 = 8 2 x 5 = 10 2 x 6 = 12 2 x 7 = 14 2 x 8 = 16 2 x 9 = 18 2 x 10 = 20

Inputnum = 5

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

Inputnum = 0

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, think of counting from 1 to 10 and multiplying each count by the chosen number. For each step, show the multiplication expression and its result. This repeats until you reach 10 times the number.

Algorithm

1

Get the number for which to print the multiplication table.

2

Start a loop from 1 to 10.

3

Multiply the number by the current loop count.

4

Print the multiplication expression and result.

5

Repeat until the loop reaches 10.

Code

javascript

const num = 7;
for (let i = 1; i <= 10; i++) {
  console.log(`${num} x ${i} = ${num * i}`);
}

Output

7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
7 x 4 = 28
7 x 5 = 35
7 x 6 = 42
7 x 7 = 49
7 x 8 = 56
7 x 9 = 63
7 x 10 = 70

Dry Run

Let's trace printing the multiplication table for 3 through the code.

1

Set number

num = 3

2

Start loop

i = 1

3

Calculate and print

Print '3 x 1 = 3'

4

Increment loop

i = 2

5

Calculate and print

Print '3 x 2 = 6'

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

Why This Works

Step 1: Loop from 1 to 10

The for loop runs 10 times, once for each multiplier from 1 to 10.

Step 2: Multiply and print

Inside the loop, multiply the chosen number by the loop counter and print the result with a clear format.

Step 3: Repeat for all multipliers

This repeats until all multiplication steps from 1 to 10 are printed.

Alternative Approaches

Using while loop

javascript

const num = 4;
let i = 1;
while(i <= 10) {
  console.log(`${num} x ${i} = ${num * i}`);
  i++;
}

This uses a <code>while</code> loop instead of <code>for</code>, which some find easier to read but requires manual increment.

Using Array.from and forEach

javascript

const num = 6;
Array.from({length: 10}, (_, i) => i + 1).forEach(i => {
  console.log(`${num} x ${i} = ${num * i}`);
});

This uses modern array methods for a functional style, which is concise but may be less clear for beginners.

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

Time Complexity

The loop runs exactly 10 times, so time complexity is O(n) where n=10, which is constant time in practice.

Space Complexity

No extra space is used besides a few variables, so space complexity is O(1).

Which Approach is Fastest?

All approaches run in constant time for 10 iterations; differences are mostly readability and style.

Approach	Time	Space	Best For
For loop	O(n)	O(1)	Simple and clear for beginners
While loop	O(n)	O(1)	When manual control of loop needed
Array.from with forEach	O(n)	O(1)	Functional style and concise code