Encyclopedia > Keyword

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In computer programming languages keyword is one of a fixed set of symbols built into the syntax of the language. Typical keywords would be if, then, else, print, goto, while, switch. There are usually restrictions about reusing keywords as names for user-defined objects such as variables or procedures. Languages vary as to what is provided as a keyword and what is a library routine[?], for example some languages provide keywords for input/output operations whereas in others these are library routines.
A keyword can also be one from a small set of words designed to convey the subject of a technical article. Some publications specify a fixed set of keywords from which those for a particular article should be chosen.

Keywords are a popular feature of the ISP America Online.

This article (or an earlier version of it) contains material from FOLDOC, used with permission.

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... and snow. Precipitation is abundant in the humid Amazon Basin[?], though more arid landscapes are found as well, in particular in the northeast. National parks ...

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