C++ Programming/Programming Languages/C++/Code/Keywords/static/Permanent Storage

Permanent storage
Using the static modifier makes a variable have static lifetime and on global variables makes them require internal linkage (variables will not be accessible from code of the same project that resides in other files).


 * static lifetime:Means that a static variable will need to be initialized in the file scope and at run time, will exist and maintain changes across until the program's process is closed, the particular order of destruction of static variables is undefined.

variables instances share the same memory location. This means that they keep their value between function calls. For example, in the following code, a static variable inside a function is used to keep track of how many times that function has been called: