BMGT 302 Lecture Notes - Lecture 12: Local Variable
23 Aug 2016
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Scope of variables: scope: which parts of a program have access to which other parts (variables and subroutines?, procedure-level variable (i. e. local variable): End sub: module-level variable (i. e. private variable) Or private salary as currency: project-level variable (i. e. public variable) Scope of subroutines: the default is that all subs have public scope: Or public sub test() end sub: to be callable only by subs within its module. Modularizing programs: one long sub (that does it all) is a bad habit. There are too many lines with possible bugs. It is difficult to reuse the code from long subs in other programs: becomes a sequence of relatively short subs, each with a specific task to perform. Their brevity and focus make them easier to read. Can be tested independently so bugs are easier to detect and fix. A much greater chance can be reused in other programs.
