As with any other 642-642 type of language, context (i.e. what is the background of a given action or statement) has a high impact on its validity or value. The same happens in a programming language. For instance, variables have a finite lifetime when your program executes. We will see that in a program we have various constructs, may they be objects, variables or any other such, and they 642-825 come into existence from the point were you declare them (before they are declared they are unknown) and then, at some point, they are destroyed (as we will see there are many reasons to be so) and all are destroyed when your program terminates.
The scope of a object or variable is simply that part a program in which the variable name is valid 642-892 (i.e. it exists). For example, in the following fragment of code, the variable 'i' is in scope only in the lines between the appropriate comments:
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