Kotlin – Capitalize String

Capitalize a String in Kotlin

To capitalize a given string in Kotlin, you can use String.capitalize() function. The function capitalises the first character in the string.

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


capitalize() function returns a new string created by capitalizing the first character in the given string.


Capitalize the string “hello world”

In the following program, we take a string value in str, and capitalize this string.

Kotlin Program

fun main() {
    val str = "hello world"
    val resultString = str.capitalize()


Hello world