Standard Streams

The standard library provides access to the streams that are attached to standard input, standard output, and standard error in the operating system. They are present in the package, and are named:

For text input or output, the system also provides versions of the above-mentioned three streams in the core package:

The text version of the streams can be modified and set to any stream. This has the effect of redirecting any output from the system to the supplied stream. The system also provides a generic print function that prints to core.stdOut: