also: ナルがた
null type
In programming, a type that represents the absence of a value; often used in languages with nullable types or option types.
In this language, a variable of null type can explicitly indicate that it holds no value.
Standard katakana spelling for the null type in computing contexts.
Alternate spelling using ナル, also seen in technical discussions.
From English 'null' + Japanese 型 (type). The alternate spelling ナル型 reflects a variant pronunciation of 'null'.