---
name: "Builtins.setIndex"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Builtins.setIndex"
---

# Builtins.setIndex(3kaya)

Change a character in a String in-place

## NAME

Builtins::setIndex - Change a character in a String in-place

## SYNOPSIS

**Void setIndex(** *String s, Char c, Int i* **)**

## ARGUMENTS

**s** The string

**c** The character to set (may not be a NULL)

**i** The position in the string

## DESCRIPTION

Sets the *i* th character of the given String to the given character. The index starts at zero.

-

   str = "abcdefg";\
    setIndex(str,'-',4); // str = "abcd-fg"

An **Builtins.IllegalIndex (3kaya)** exception is thrown if *i* is out of bounds.

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.

## RELATED

**Builtins.getIndex (3kaya)**