Built-in I/O tools

This page describes the built-in I/O tools:

out tool

tool out(string pattern, object?... args)

Prints formatted text (based on a pattern and arguments) to the standard output stream (stdout).

Parameters

pattern

The format pattern.

args

The arguments.

Runtime errors

  • If the format pattern is invalid.

  • If the format pattern and arguments don’t match.

err tool

tool err(string pattern, object?... args)

Prints formatted text (based on a pattern and arguments) to the standard error stream (stderr).

Parameters

pattern

The format pattern.

args

The arguments.

Runtime errors

  • If the format pattern is invalid.

  • If the format pattern and arguments don’t match.

outln tool

tool outln(string pattern = "", object?... args)

Prints formatted text (based on a pattern and arguments) to the standard output stream (stdout), printing an additional new line at the end.

Parameters

pattern

The format pattern.

args

The arguments.

Runtime errors

  • If the format pattern is invalid.

  • If the format pattern and arguments don’t match.

errln tool

tool errln(string pattern = "", object?... args)

Prints formatted text (based on a pattern and arguments) to the standard error stream (stderr), printing an additional new line at the end.

Parameters

pattern

The format pattern.

args

The arguments.

Runtime errors

  • If the format pattern is invalid.

  • If the format pattern and arguments don’t match.