macro_rules! println { () => { ... }; ($($arg:tt)*) => { ... }; }
Prints to the standard output, with a newline.
On all platforms, the newline is the LINE FEED character (\n
/U+000A
) alone (no additional CARRIAGE RETURN (\r
/U+000D
)).
Use the format!
syntax to write data to the standard output. See std::fmt
for more information.
Use println!
only for the primary output of your program. Use eprintln!
instead to print error and progress messages.
Panics if writing to io::stdout
fails.
println!(); // prints just a newline println!("hello there!"); println!("format {} arguments", "some");
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/macro.println.html