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Hello world program - Wikipedia, the free encyclopedia |
 | | A "hello world" program is a software program that prints out "Hello world!" on a display device. |
 | | In many embedded systems, the text may be sent to a one or two-line liquid crystal display (LCD), or some other appropriate signal, such as an LED being turned on, may substitute for the message. |
 | | A "hello world" program can be a useful sanity test to make sure that a language's compiler, development environment, and run-time environment are correctly installed. |
| en.wikipedia.org /wiki/Hello_world (492 words) |
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