Ranges in Kotlin

To create ranges of variables in Kotlin, you can use the rangeTo extension function or the .. operator of Kotlin. We can create a range of any Comparable type.

Let's look at the following example:

fun main(args: Array<String>) {
val int = args[0].toInt()
if (int in 0..10) {
println(int)
    }
}

In this example, we retrieve a value from the args array.

Note

The args array contains command-line arguments that can be used to pass parameters or specify a configuration when an application is launched.

To run a program with parameters in IntelliJ IDEA, click Run and choose Edit Configurations...:

In the window that opens, you can paste parameters in the Program arguments field:

Press OK and run the application. The output will be as follows:

2

Decompiled to Java, it looks like the following:

public static final void main(@NotNull String[] args) {
   Intrinsics.checkParameterIsNotNull(args, "args");
   String var2 = args[0];
int value = Integer.parseInt(var2);
if (0 <= value) {
if...