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Local variable information


In computer science, a local variable is a variable that is given local scope. A local variable reference in the function or block in which it is declared overrides the same variable name in the larger scope. In programming languages with only two levels of visibility, local variables are contrasted with global variables. On the other hand, many ALGOL-derived languages allow any number of nested levels of visibility, with private variables, functions, constants and types hidden within them, either by nested blocks or nested functions. Local variables are fundamental to procedural programming, and more generally modular programming: variables of local scope are used to avoid issues with side-effects that can occur with global variables.

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Local variable

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In computer science, a local variable is a variable that is given local scope. A local variable reference in the function or block in which it is declared...

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Environment variable

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environment variable is a user-definable value that can affect the way running processes will behave on a computer. Environment variables are part of...

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Free variables and bound variables

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free variable refers to variables used in a function that are neither local variables nor parameters of that function. The term non-local variable is often...

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Automatic variable

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automatic variable is a local variable which is allocated and deallocated automatically when program flow enters and leaves the variable's scope. The...

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Global variable

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where all variables are local with no shared memory (and therefore all interactions can be reconducted to message passing). Global variables are used extensively...

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Static variable

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and a static local variable, which has local scope. A static local variable is different from a local variable as a static local variable is initialized...

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External variable

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language, an external variable is a variable defined outside any function block. On the other hand, a local (automatic) variable is a variable defined inside...

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Pure function

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identical for identical arguments (no variation with local static variables, non-local variables, mutable reference arguments or input streams, i.e.,...

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Variable shadowing

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variable shadowing occurs when a variable declared within a certain scope (decision block, method, or inner class) has the same name as a variable declared...

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Member variable

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{ Foo rect; // Local variable return 0; } public class Program { public static void main(String[] args) { // This is a local variable. Its lifespan //...

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Java bytecode

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stack machine and a register machine, utilizing an operand stack and local variables for executing operations. The bytecode comprises various instruction...

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Computer program

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other hand, variable declarations inside of main(), other functions, or within { } block delimiters are local variables. Local variables also include...

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Local

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film The Local, English-language news websites in several European countries .local, a network address component Local variable, a variable that is given...

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Hidden variable

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or unmeasurable (and thus "hidden") variables Local hidden-variable theory, in quantum mechanics, a hidden-variable theory in which distant events are...

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C syntax

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not done, the variable becomes a dangling pointer which can lead to a use-after-free bug. However, if the pointer is a local variable, setting it to...

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Temporary variable

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usually declared as a local variable, i.e., a variable with local scope. There is no formal definition of what makes a variable temporary, but it is an...

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Uninitialized variable

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In computing, an uninitialized variable is a variable that is declared but is not set to a definite known value before it is used. It will have some value...

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Resource acquisition is initialization

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are acquired) by tying the resource to the lifetime of a stack variable (a local variable declared in a given scope): if an exception is thrown, and proper...

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