Kotlin for Enterprise Applications using Java EE

Iterating over a list

Collections are used for storing and processing a set of objects. Kotlin provides an elegant syntax for iteration over a collection. 

Consider the code for 9_IteratingOverList.kts:

val names = listOf("Mark", "Tina", "Williams")for(name in names) {    println(name)}

 The output is as follows:

If we are interested in getting the index value, we can do that by running the indices command on the collection.

Consider the code for 9a_IteratingOverListIndex.kts:

val names = listOf("Mark", "Tina", "Williams")for(index in names.indices) {    println(index)}

The output is as follows:

As the index is a String, we can write an expression ...