> For the complete documentation index, see [llms.txt](https://gold.gitbook.io/kotlin/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gold.gitbook.io/kotlin/collections/aggregate-operations/foreachindexed.md).

# forEachIndexed

```kotlin
public inline fun <T> Iterable<T>.forEachIndexed(
action: (index: Int, T) -> Unit): Unit {
    var index = 0
    for (item in this) action(index++, item)
}

val list = listOf(1, 2, 3, 4, 5)
list.forEachIndexed{ index, value ->
    println("index = $index, value = $value")
}

/*
index = 0, value = 1
index = 1, value = 2
index = 2, value = 3
index = 3, value = 4
index = 4, value = 5
*/
```