noun
formal parameter; formal argument
Computing term for a parameter in a function or method definition, as opposed to an actual argument (実引数) passed during a call.
See also: 実引数
関数の仮引数にデフォルト値を設定する。
Set a default value for the function's formal parameter.
仮引数と実引数の違いを理解する。
Understand the difference between formal parameters and actual arguments.
実引数 is the actual argument passed to a function, while 仮引数 is the formal parameter defined in the function signature.
Compound of 仮 (temporary, provisional) and 引数 (argument, parameter). The term is a calque from English 'formal parameter'.