Kotlin TutorialLesson 17Free preview

Kotlin For Loop

This lesson is part of Kotlin · All levels

Summary

This lesson reviews the iteration of 'for' in Kotlin which adopts the concept of the 'for in' iterator. This repetition is very flexible for tracking array elements, data collection (List, Set, Map), and the range of numbers. Beginner developers will learn how to read elements and their indexes using withIndex().

Key points

The repetition of 'for (item in collection) ' iterates each element that provides the iterator
Working smoothly with ranges and data collection
The '.indices' function produces a valid index range of an array
The '.withIndex() ' function allows destructing index and value pairs simultaneously

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