Example 1: Generate Multiplication Table using for loop
fun main(args: Array<String>) {
val num = 5
for (i in 1..10) {
val product = num * i
println("$num * $i = $product")
}
}
When you run the program, the output will be:
5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45 5 * 10 = 50
Unlike Java, in the above program, we've used ranges and in operator to loop through numbers from 1 to 10.
Here's the equivalent Java code: Java Program to Generate Multiplication Table.
The same multiplication table can also be generated using a while loop in Kotlin.
Example 2: Generate Multiplication Table using while loop
fun main(args: Array<String>) {
val num = 9
var i = 1
while (i <= 10) {
val product = num * i
println("$num * $i = $product")
i++
}
}
When you run the program, the output will be:
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
In the above program, unlike a for loop, we have to increment the value of i inside the body of the loop.
Though both programs are technically correct, it is better to use for loop in this case. It's because the number of iteration (from 1 to 10) is known.