Introduction
Static variables are variables that are declared with the static keyword. They are used to store data that is shared across all instances of a class or program. Static variables are typically used to store data that is not changed often, such as constants or configuration settings. They are also used to store data that is shared between multiple functions or classes. In this article, we will discuss the basics of static variable declaration and how it can be used in programming.
Solution
static int myVariable;
Assuming C/C++, I found this here:
(1) The use of static inside a function … means that once the variable has been initialized, it remains in memory until the end of the program. You can think of it as saying that the variable sticks around, maintaining its value, until the program completely ends. For instance, you can use a static variable to record the number of times a function has been called simply by including the lines static int count =0; and count++; inside the function.
(2) Because count is a static variable, the line “static int count = 0;” will only be executed once. Whenever the function is called, count will have the last value assigned to it.
So, two things going on: from (1), a will stick around for the whole program. From (2), the declaration/initialization of a will happen exactly once, at the beginning. Subsequent recursive calls on your function will not redeclare/reinitialize a.
10
solved Variable declaration using static keyword [closed]
The static keyword is used to declare a variable in C and C++ programming languages. It is used to indicate that the variable is to be stored in the static memory area. This means that the variable will retain its value even after the program has finished executing. The static keyword can also be used to declare a function, which means that the function will be available to all other functions in the program.
When declaring a variable using the static keyword, the variable is initialized to a default value. This default value is usually 0 or NULL, depending on the type of the variable. The static keyword can also be used to declare a global variable, which means that the variable is accessible from any part of the program. This is useful for sharing data between different functions.
When declaring a variable using the static keyword, the variable is only visible within the scope of the function in which it is declared. This means that the variable cannot be accessed from outside the function. This is useful for keeping data private and secure. It also helps to prevent accidental changes to the variable from other parts of the program.
The static keyword can also be used to declare a static member variable. This is a variable that is shared between all instances of a class. This is useful for sharing data between different objects of the same class. It also helps to prevent accidental changes to the variable from other parts of the program.
In summary, the static keyword is used to declare a variable in C and C++ programming languages. It is used to indicate that the variable is to be stored in the static memory area. The static keyword can also be used to declare a global variable, a static member variable, and a function. This is useful for sharing data between different functions and objects of the same class.