View source for Scope

'''Scope''' is a term which has a number of meanings in the world of information systemw.

==Programming languages==

Most formally, in a [[programming language]], it is the range in a [[program]] over which a particular [[variable]] is visible/usable.

For instance, [[local variable]]s in an inner [[control flow|block]] can only be used in that block.

A '''global''' variable is one which can be seen, and used, anywhere; in programming languages which allow separately [[compiler|compiled]] [[Architecture#Architectural techniques|modules]] to be joined together with a [[linker]] after the compilation, a global variable created in one could be seen/used in any part of the linked program.

==Networks==

In a [[communication network]], a scope means a subset of the network, one inside a boundary which selects a portion of the entire network.

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[[Category: Software Basics]]