Kotlin – Convert string to Lowercase

Convert String to Lowercase in Kotlin

To convert a given string to a lowercase string in Kotlin, you can use String.toLowerCase() function.

Call toLowerCase() function on the given String object str.


toLowerCase() function returns a new string created from converting all the characters of the calling string to lowercase.


Convert given string to lowercase

Consider a scenario where we are given a string, say "Hello World" in a variable str. We need to convert the characters in this string to their lowercase, and print the resulting string.

Kotlin Program

fun main() {
    val str = "Hello World"
    val lowercaseString = str.toLowerCase()


hello world