# Macro eprint

1.19.0 · Source

    macro_rules! eprint {
        ($($arg:tt)*) => { ... };
    }

Expand description

Prints to the standard error.

Equivalent to the `print!` macro, except that output goes to `io::stderr` instead of `io::stdout`. See `print!` for example usage.

Use `eprint!` only for error and progress messages. Use `print!` instead for the primary output of your program.

See the formatting documentation in `std::fmt` for details of the macro argument syntax.

## §Panics

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

Writing to non-blocking stderr can cause an error, which will lead this macro to panic.

## §Examples

    eprint!("Error: Could not complete task");