翻訳と辞書
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・ lispview
・ list
・ list comprehension
・ list enhanced
・ listless
・ listproc
・ lists
・ listserv
・ liszt
・ lite
literal
・ literate programming
・ literature
・ lithe
・ lithium lick
・ litprog
・ little
・ little smalltalk
・ little-endian
・ live data


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literal : FOLDOC
literal
A constant made available to a process, by inclusion in the executable text. Most modern systems do not allow texts to modify themselves during execution, so literals are indeed constant; their value is written at compile-time and is read-only at run time.
In contrast, values placed in variables or files and accessed by the process via a symbolic name, can be changed during execution. This may be an asset. For example, messages can be given in a choice of languages by placing the translation in a file.
Literals are used when such modification is not desired. The name of the file mentioned above (not its content), or a physical constant such as 3.14159, might be coded as a literal. Literals can be accessed quickly, a potential advantage of their use.
(1996-01-23)



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