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・ Nulato, Alaska
・ Nule
・ Nuleri Land District
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・ Nulhegan Band of the Coosuk Abenaki Nation
・ Nuli
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・ Null
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Null (computing)
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・ Null (radio)
・ Null (SQL)
・ Null allele
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・ Null character
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Null (computing) : ウィキペディア英語版
Null (computing)
NULL or null in computing marks the absence of a value.
==Examples==

*Null (SQL), a special marker and keyword in SQL
*Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol has no visual representation.
*Null device, a special computer file that discards all data written to it
*Null modem, a specially wired serial communications cable
*Null Object pattern, a software design pattern using an object with defined neutral behavior
*Null pointer (sometimes written NULL, nil, or None), used in computer programming for an uninitialized, undefined, empty, or meaningless value
*Null string, the unique string of length zero (in computer science and formal language theory)
*Null-terminated string, a character string of which the length is determined by the first null-character (in programming language C and related languages)
*Nullable type, a feature of some statically-typed programming languages which allows a data type to be set to the special value NULL

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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