std::println - Rust
Description: API documentation for the Rust `println` macro in crate `std`.
Keywords: rust, rustlang, rust-lang, println

# Macro std::println 1.0.0 [−] [src]

    macro_rules! println {
        () => { ... };
        ($fmt:expr) => { ... };
        ($fmt:expr, $($arg:tt)*) => { ... };
    }

Macro for printing 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

Panics if writing to `io::stdout` fails.

# Examples

    println!(); // prints just a newline
    println!("hello there!");
    println!("format {} arguments", "some");Run

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