Kotlin Program to Print Multiplication Table

You can print a multiplication table in Kotlin using a for loop like this: for (i in 1..10) { println("$number x $i = ${number * i}") } where number is the base number.

Examples

Inputnumber = 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

Inputnumber = 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

Inputnumber = 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 multiplying the given number by each number from 1 to 10. Use a loop to repeat this multiplication and print the result each time. This way, you get all the products in order.

Algorithm

1

Get the number for which to print the multiplication table

2

Start a loop from 1 to 10

3

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

4

Print the multiplication expression and result

5

End the loop after 10 iterations

Code

kotlin

fun main() {
    val number = 7
    for (i in 1..10) {
        println("$number x $i = ${number * 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 number 3 through the code

1

Set number

number = 3

2

Start loop

i = 1

3

Calculate and print

3 x 1 = 3

4

Next iteration

i = 2, print 3 x 2 = 6

5

Continue until i=10

Print 3 x 10 = 30

i	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

In each loop, multiply the base number by the current loop number and print the formatted string.

Step 3: Output all lines

This prints all lines of the multiplication table in order, showing the calculation and result.

Alternative Approaches

Using while loop

kotlin

fun main() {
    val number = 4
    var i = 1
    while (i <= 10) {
        println("$number x $i = ${number * i}")
        i++
    }
}

This uses a <code>while</code> loop instead of <code>for</code>. It works the same but requires manual increment.

Using repeat function

kotlin

fun main() {
    val number = 6
    repeat(10) { i ->
        println("$number x ${i + 1} = ${number * (i + 1)}")
    }
}

The <code>repeat</code> function runs the block 10 times with index <code>i</code> starting at 0.

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

Time Complexity

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

Space Complexity

No extra memory is used except for loop variables, so space is O(1).

Which Approach is Fastest?

All approaches run in constant time and space; choice depends on readability and style preference.

Approach	Time	Space	Best For
For loop	O(1)	O(1)	Simple and clear iteration
While loop	O(1)	O(1)	Manual control of loop variable
Repeat function	O(1)	O(1)	Concise syntax with index