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Hello World!

Problem

You want to write the classic "Hello World!" program in Scheme

Solution

This is very easy in Scheme:

> (begin (display "Hello World!") (newline))
Hello World!

Discussion

Scheme provides an interactive prompt, called the Read-Eval-Print-Loop (REPL), that allows you to type programs directly into Scheme and have them evaluated immediately. This allows for much more immediate feedback than compiled languages.

This is the first program many C programmers write, but it isn't the best way to start programming Scheme. Scheme makes extensive use of the functional style and it is better to become acquainted with this style before delving into input and output.

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Contributors

-- NoelWelsh - 31 Aug 2004