what is the difference between static & global variables?
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A static variable is only visible in the source file or {} block it is declared in, but exists and holds its value for the life of the program in global memory. A global variable is the same but visible anywhere.
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static means there is only one copy of the variable in memory shared by all instances of the class. The final keyword just means the value can't be changed. Without final , any object can change the value of the variable.
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Difference Between Class Variables And Instance Variables In Java : Class variables are declared with keyword static and Instance variables are declared without static keyword. Class variables are common to all instances of a class. These variables are shared between the objects of a class.
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It is possible to create a global variable in one file and access it from another file. In order to do this, the variable must be declared in both files, but the keyword extern must precede the "second" declaration. ... A global static variable is one that can only be accessed in the file where it is created.
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Global variables are declared outside any function, and they can be accessed (used) on any function in the program. Local variables are declared inside a function, and can be used only inside that function. It is possible to have local variables with the same name in different functions.
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A private variable is only accessible inside the class. A static variable belongs to the class rather than to an instance of a class. Notice that the variable DEPARTMENT is also final , which means that it cannot be modified once it is set.
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The key difference between the two is that with static type checking, the type of variable is known at compile time (it checks the type of variable before running) while with dynamic type checking, the type of variable is known at runtime (it checks the type of variable while executing).
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Find out the difference between global and local variables. Global variables are declared outside any function, and they can be accessed (used) on any function in the program. Local variables are declared inside a function, and can be used only inside that function.
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['Local Variables - Temporary Storage. ... ', 'Instance Variables - Staying with the Object. ... ', 'Static Variables - Storage for the Life of the Program.']
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Think static = class, nonstatic = instance. There are those variable that is associated with object. Instance variables are defined inside the class, but outside of any method, and are only initialized when the class is instantiated. Their values are unique to each instance of a class.
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In the above output, local variables will have only empty value before and after calling the function. Its scope is only with in the function. It got vanished out of the function, whereas the global variable has the updated value even after the function execution.
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Global variables are declared outside any function, and they can be accessed (used) on any function in the program. Local variables are declared inside a function, and can be used only inside that function. ... The scope of a variable refers to where is a variable visible or accesible.
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A static variable can be thought of as a variable that is allocated in memory for the lifetime of during program execution. ... A dynamic variable is a variable that can hold any value provided by the user during any program execution. Every time, new memory space is allocated for such a variable.
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Class variables also known as static variables are declared with the static keyword in a class, but outside a method, constructor or a block. Instance variables are created when an object is created with the use of the keyword 'new' and destroyed when the object is destroyed.
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A local static variable is a variable that can maintain its value from one function call to another and it will exist until the program ends. ... A global static variable is one that can only be accessed in the file where it is created.
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There are two types of variables: global variables and local variables. The scope of global variables is the entire program whereas the scope of local variable is limited to the function where it is defined.
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Local variables are not visible outside the method. Instance variables are declared in a class, but outside a method. They are also called member or field variables. ... Class/static variables are declared with the static keyword in a class, but outside a method.