scoping

In computer programming, the scope of a name binding – an association of a name to an entity, such as a variable – is the part of a computer program where the binding is valid: where the name can be used to refer to the entity. In other parts of the program the name may refer to a different entity (it may have a different binding), or to nothing at all (it may be unbound). The scope of a binding is also known as the visibility of an entity, particularly in older or more technical literature – this is from the perspective of the referenced entity, not the referencing name. A scope is a part of a program that is or can be the scope for a set of bindings – a precise definition is tricky (see below), but in casual use and in practice largely corresponds to a block, a function, or a file, depending on language and type of entity. The term "scope" is also used to refer to the set of all entities that are visible or names that are valid within a portion of the program or at a given point in a program, which is more correctly referred to as context or environment.

Scoping ist die Definition von Aufgaben- oder Untersuchungsumfängen in komplexen Planungs-, Management- und Herstellungsprozessen. Das Wort leitet sich aus dem englischen scope ab, was die Bedeutungen Umfang, Abgrenzung, Raum, Aufgabenbereich, Spielraum u.ä. haben kann.

In de logica en de informatica is het bereik van een variabele of kwantor het gedeelte van een formule/stuk programmacode waarin de (door een kwantor geïntroduceerde) variabele "zichtbaar" is.

En informatique, la portée ( en anglais) d'un identifiant est l'étendue au sein de laquelle cet identifiant est lié. Cette portée peut être lexicale ou dynamique.