onEachIndexed

Performs the given action on each character, providing sequential index with the character, and returns the char sequence itself afterwards.

inline fun <S : CharSequence> S.onEachIndexed(action: (index: Int, Char) -> Unit): S(source)

val text = "Kotlin"

text.onEachIndexed { index, char ->
    println("Index $index: $char")
}

println("Original text: $text")

Source