fun forLoopListItems() {
val items = listOf("apple", "banana", "kiwifruit")
for (i in items) {
if (i.equals("banana")) {
println("position is ${i.indices}")
}
}
}
This is My Kotlin code used with For Loop. I tried to Print Index Curresponding to "banana" But Result is "System.out: position is 0..5" How is it Become 0..5 ?
The indices method gives you a range, which is 0..5 in this case because it's called on the String: banana with a length of 6.
You can instead iterate with indices as follows:
items.forEachIndexed { i, element ->
if (element == "banana") {
println("position is $i")
}
}
Alternative ways of iterating with indices are listed in this post.
I'm not sure if you really want to iterate explicitly though. Maybe it's fine for you to use built-in functions for finding the index of your element:
println(items.indexOf("banana"))
There is indexOf:
Returns first index of element, or -1 if the collection does not contain element.
and lastIndexOf:
Returns last index of element, or -1 if the collection does not contain element.
val items = listOf("apple", "banana", "kiwifruit")
val appleIndex = items.indexOf("apple") // 0
val lastAppleIndex = items.lastIndexOf("apple") // 0
val bananaIndex = items.indexOf("banana") // 1
val orangeIndex = items.indexOf("orange") // -1
You can iterate with Index using forEachIndexed method of Kotlin
Iterate with Index
itemList.forEachIndexed{index, item ->
println("index = $index, item = $item ")
}
Check if item is Banana and print Index
itemList.forEachIndexed{ index, item -> {
if (item.equals("banana")) {println("position is ${index}")}
}
