Tutorials References Exercises Videos NEW Menu
Paid Courses Website NEW

Kotlin For Loop


Kotlin For Loop

Often when you work with arrays, you need to loop through all of the elements.

To loop through array elements, use the for loop together with the in operator:

Example

Output all elements in the cars array:

val cars = arrayOf("Volvo", "BMW", "Ford", "Mazda")
for (x in cars) {
  println(x)
}
Try it Yourself »

You can loop through all kinds of arrays. In the example above, we used an array of strings.

In the example above, we loop through an array of integers:

Example

val nums = arrayOf(1, 5, 10, 15, 20)
for (x in nums) {
  println(x)
}
Try it Yourself »

Traditional For Loop

Unlike Java and other programming languages, there is no traditional for loop in Kotlin.

In Kotlin, the for loop is used to loop through arrays, ranges, and other things that contains a countable number of values.

You will learn more about ranges in the next chapter - which will create a range of values.