Region of a computer program where a name binding is valid
Also known as lexical scope · context · variable scope · programming scope · scope of a name · scope of a variable
16 statements · 13% with external sources · numbers in brackets are citations
3 identifiers linking scope across the web's reference databases
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In computer programming, the scope of a name binding is the part of a program in which the name binding is valid. In other words, a scope is where a name can be used to refer to an entity. In other parts of the program, the name may refer to a different entity, or to nothing at all. Scope helps prevent name collisions by allowing the same name to refer to different objects – as long as the names have separate scopes. The scope of a name binding is also known as the visibility of an entity, particularly in older or more technical literature—this is in relation to the referenced entity, not the referencing name.