In computer science
, a keyword
is an identifier
which has been reserved for core language
usage. Some common keywords are: else
, etc. There are usually restrictions about reusing keywords as names for user-defined objects such as variables
. 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.
is a featured word of a technical article. Some publications specify a fixed set of keywords from which those for a particular article should be chosen.
are a feature of the ISP America Online
; which allow one to bypass URLs