Programming variable that persists for the lifetime of the program
See also: Static (keyword)
In computer programming, a static variable is a variable that has been allocated "statically", meaning that its lifetime (or "extent") is the entire run of the program. This is in contrast to shorter-lived automatic variables, whose storage is stack allocated and deallocated on the call stack; and in contrast to objects, whose storage is dynamically allocated and deallocated in heap memory.
Variable lifetime is contrasted with scope (where a variable can be used): "global" and "local" refer to scope, not lifetime, but scope often implies lifetime. In many languages, global variables are always static, but in some languages they are dynamic, while local variables are generally automatic, but may be static.
In general, static memory allocation is the allocation of memory at compile time, before the associated program is executed, unlike dynamic memory allocation or automatic memory allocation where memory is allocated as required at run time.[1]
^Jack Rons. "What is static memory allocation and dynamic memory allocation?". MeritHub [An Institute of Career Development]. Retrieved 2011-06-16. The compiler allocates required memory space for a declared variable. By using the addressof operator, the reserved address is obtained and this address may be assigned to a pointer variable. Since most of the declared variables have static memory, this way of assigning pointer value to a pointer variable is known as static memory allocation. Memory is assigned during compilation time.[dead link]
In computer programming, a staticvariable is a variable that has been allocated "statically", meaning that its lifetime (or "extent") is the entire run...
Thus in some languages, static member variable or static member function are used synonymously with or in place of "class variable" or "class function",...
lexical (static) scoping is far more common. In lexical scoping (or lexical scope; also called static scoping or static scope), if a variable name's scope...
all global variables is known as the global environment or global state. In compiled languages, global variables are generally staticvariables, whose extent...
variable—it just cannot refer to it by name. It is also possible to use the static keyword on the definition of a local variable. Without the static keyword...
identical for identical arguments (no variation with local staticvariables, non-local variables, mutable reference arguments or input streams, i.e., referential...
static or -static in Wiktionary, the free dictionary. Static may refer to: Static Nunatak, in Antarctica Static, Kentucky and Tennessee, U.S. Static Peak...
objects Providing a static method that returns a reference to the instance The instance is usually stored as a private staticvariable; the instance is created...
or instance. An instance variable has similarities with a class variable, but is non-static. An instance variable is a variable which is declared in a class...
variables are automatic local variables, but static local variables also exist, notably in C. For a static local variable, the allocation is static (the...
saving of state information in variables local to each execution, usually on a stack, instead of in static or global variables or other non-local state. All...
of a program that contains initialized staticvariables, that is, global variables and static local variables. The size of this segment is determined...
A static VAR compensator (SVC) is a set of electrical devices for providing fast-acting reactive power on high-voltage electricity transmission networks...
distinguished into two types: class variables (also called static member variables), where only one copy of the variable is shared with all instances of the...
Local variables declared using the static prefix are also stored in the global and static data region. Unlike global variables, staticvariables are only...
In computer science, a static library or statically linked library is a set of routines, external functions and variables which are resolved in a caller...
to indicate that a variable should not be statically type checked. A variable whose type is dynamic will not be subject to static type checking. Instead...
released at the end of some scope. Objects stored in a staticvariable (notably a global variable) may not be finalized when the program terminates, so...
lifetime coincides with variable lifetime of a variable with that object as value (both for staticvariables and automatic variables), but in general, object...
stationary magnetic field, see Magnetostatics Class variable, a variable declared with the static keyword in object-oriented programming languages This...
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