# readLine(strippingNewline:) Returns a string read from standard input through the end of the current line or until EOF is reached. ``` func readLine(strippingNewline: Bool = true) -> String? ``` ## Parameters `strippingNewline` If `true`, newline characters and character combinations are stripped from the result; otherwise, newline characters or character combinations are preserved. The default is `true`. ## Return Value The string of characters read from standard input. If EOF has already been reached when `readLine()` is called, the result is `nil`. ## Discussion Standard input is interpreted as `UTF-8`. Invalid bytes are replaced by Unicode [replacement characters](https://unicode.org/glossary/#replacement_character). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)