what is default storage class for local variable and global variables?
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static is the default storage class for global variables.
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The Heap Space contains all objects are created, but Stack contains any reference to those objects. Objects stored in the Heap can be accessed throughout the application. Primitive local variables are only accessed the Stack Memory blocks that contain their methods.
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Local variables are stored in each thread's own stack. That means that local variables are never shared between threads. so Method area and Heap is shared by all the threads but every thread is having its own JAVA Stack and PC and that is not shared by any other Threads. ... so all the local variables are THREAD SAFE.
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If a variable is global, you can access it in any compilation unit (commonly called source file, module etc.) If a variable is defined globally, there should be a way to tell compiler about possible global variables (or functions) that we may encounter. Keyword extern is present exactly for the same reason.
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So we can say that class variables and instance variables are fields while local variables and parameter variables are not. The question is old but another important difference between a variable and a field is that a field gets a default value when it's declared. A variable, on the other hand, must be initialized.
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The answer is 0. ... A declared variable can be Zero Initialized, Value Initialized or Default Initialized.
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Check if a variable exists locally or globally Use locals() to return a dictionary of variables defined locally. Use the syntax variable in locals() to check if a variable is defined locally. Use globals() to return a dictionary for variables defined globally.
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Local variables are stored in memory area of the corresponding function. Scope of a variable is a program part, in which a variable can be referred to. Variables declared inside a block (at the internal level), have the block as their scope.
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A global variable in C/C++ is a variable which can be accessed from any module in your program. int myGlobalVariable; ... extern int myGlobalVariable; This tells the compiler "there's a variable defined in another module called myGlobalVariable, of type integer.
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Variable is a named storage of some data type(like int, float etc). And Objects are variables of data types that are user defined. So we say that an object is an instance of a class. And class is nothing but a user defined data type.
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The xdata memory type may be used to declare variables only. ... This memory is indirectly accessed using 16-bit addresses and is the external data RAM of the 8051. The amount of xdata is limited in size (to 64K or less). Variables declared xdata are located in the XDATA memory class.
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Lua keeps a distinguished environment called the global environment. This value is kept at a special index in the C registry. In Lua, the global variable _G is initialized with this same value. ( _G is never used internally.) When Lua loads a chunk, the default value for its _ENV upvalue is the global environment.
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Originally Answered: What is the difference between the local variable and global variable in C? A local variable is defined inside a function. It is available only in the function in which it is defined. A Global variable is defined outside all the functions defined in a program.
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Global and static variables are initialized to their default values because it is in the C or C++ standards and it is free to assign a value by zero at compile time. Both static and global variable behave same to the generated object code.
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Session storage is destroyed once the user closes the browser whereas, Local storage stores data with no expiration date. The sessionStorage object is equal to the localStorage object, except that it stores the data for only one session. ... Local storage is per domain.
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Heap - Since global variable is stored in the heap, heap is shared among threads. ... Code - Threads can have different code, so sharing code is not always the case. Data - Unsure about what to consider under data. But sure that global variables are shared among threads.
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Variables are stored on the CMake cache. This is a file named CMakeCache. txt on the root of the build directory.