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I/O Routines

Modula-3 uses the concept of readers and writers to perform I/O. A reader is a character input stream, and a writer is a character output stream. The Stdio interface defines a reader stdin for standard input (normally the keyboard) and a writer stdout for standard output (the video display).

The most common I/O routines for readers and writers are packaged in the IO module. More flexible IO routines exist in the Rd, Wr, and Lex modules.


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