delimited scope statement
Computing term for a statement that explicitly defines the scope of a variable, block, or construct, often using delimiters.
In programming languages, you can limit the scope of a variable using a delimited scope statement.
スコープ is a more general loanword for 'scope', while 範囲明示文 specifically refers to a syntactic statement that delimits scope.
Compound of 範囲 (scope, range), 明示 (explicit indication), and 文 (statement). A technical term likely coined in the context of programming language design.