Macro std::eprintln 1.19.0[−][src]
macro_rules! eprintln {
() => { ... };
($($arg : tt) *) => { ... };
}Expand description
Prints to the standard error, with a newline.
Equivalent to the println! macro, except that output goes to
io::stderr instead of io::stdout. See println! for
example usage.
Use eprintln! only for error and progress messages. Use println!
instead for the primary output of your program.
Panics
Panics if writing to io::stderr fails.
Examples
eprintln!("Error: Could not complete task");Run