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Okay lets take an example. Suppose you are in your house. Now a person wants to visit you. But he wont find you in your locality. Because currently you are in your house. So he has to come to your house to find you.
Similarly where you declare a variable and whether its restricted to some other classes or functions is what defines variable scope. So if the variable is defined in a function it can be accessible from that function only and nowhere else. Also a global variable can be given a restricted access by declaring it protected,friendly or private.
What else can I help you with?
What is meant by delare or initialize a variable or constant at a lowest possible level?
It probably refers to "scope" (see http://en.wikipedia.org/wiki/Scope_(programming)). In programming languages with lexical scope, variables declared in an outer scope can be used in an inner scope, but variables declared in an inner scope cannot be used in outer scopes. It is considered best practice to declare variables (and constants, which are just variables that don't change) at the innermost scope possible for several reasons: # It makes it most clear what the scope of use is of the variable. # It makes it impossible to mistakenly use it in some other location. # It makes it easier to keep track of what variables exist at any given point in the code. For example, in standard C, nested functions are not allowed. This means that in any function, only two types of variables exist - global variables, and variables declared within that function. This has the advantage of making it easy to understand what any variable refers to.
What is the scope of register variables?
The block they are declared in.
Examples of automatic variables in c?
Automatic variables are variables that are declared within the scope of a block, usually a function. They exist only within that scope, i.e. that block, and they cease to exist after the block is exited. These variables are usually allocated from the stack frame.
Which variable is not destroyed on exit from the function instead its value is presented and becomes available again when the function is next called These variables are declared as?
Local function variables defined static remain in memory at all times. Such variables are only in scope (accessible) when the function itself is in scope.
What is Variable Shadowing in Java?
In Java, there are three kinds of variables: local variables, instance variables, and class variables. Variables have their scopes. Different kinds of variables have different scopes. A variable is shadowed if there is another variable with the same name that is closer in scope. In other words, referring to the variable by name will use the one closest in scope, the one in the outer scope is shadowed.A Local Variable Shadows An Instance VariableInside a class method, when a local variable have the same name as one of the instance variable, the local variable shadows the instance variable inside the method block.
Scope of static variables?
Scope of static variable is with in the file if it is static global. Scope of static variable is with in the function if variable is declared local to a function. But the life time is throughout the program
Five Major Variables of Project Management?
scope,time,cost,quality and risk
The language like 'c' allows the use of same name for two different variables Is it possible for lexical analyser to distinguish between such variables?
Using the same name for two different variables in languages like C is possible only within two different scopes, such as outside a block and inside a block... int somevariable; /* outside scope */ { ... int somevariable; /* inside scope */ } In order for a lexical analyzer to distinguish those two variables, it must be able to parse the program and resolve scope the same way the compiler does.
How we can get address of variables in Java as pointer variables in C?
At any given point of time you cann't get the address of a variables of java program. This is meant for security purpose only.
In most languages where does a local variables scope begin and end?
A local variable only exists within the scope in which it is declared. As soon as the scope ends, the variable ceases to exist. { // beginning of a scope, i does not yet exist int i = 42; // local variable declared, i now exists } // end of scope, i no longer exists
What is meant by pointers in c language?
Variables (or constants) that contain addresses.
What is the scope of any variable?
The Scope of a variable defines the areas of a program where this variable would be visible and can be used. For ex: a. Method variables - are visible only inside the method where they are declared and hence their scope is only the method b. Class variables - are visible inside the class and can be used by any method inside the class and hence their scope is the whole class.
