What is the lifetime of a static variable in a function?
Understand the Problem
The question is asking about the lifetime of static variables within the context of a function in programming. It presents multiple choice options to determine what happens to a static variable in terms of its existence and lifecycle during and after function calls.
Answer
The lifetime of a static variable is the lifetime of the program.
The lifetime of a static variable in a function is the entire runtime of the program. It is created when the program starts and is destroyed when the program ends, regardless of how many times the function is called.
Answer for screen readers
The lifetime of a static variable in a function is the entire runtime of the program. It is created when the program starts and is destroyed when the program ends, regardless of how many times the function is called.
More Information
Static variables in a function are initialized only once and retain their value across function calls, making them useful for storing state information within a function.
Tips
Confusing the scope with lifetime is a common mistake. While the scope of a static variable may be limited to the function, its lifetime is as long as the program runs.
Sources
- Variable Scope - cs.mtsu.edu
- What is the lifetime of a static variable in a C++ function? - Tutorialspoint - tutorialspoint.com
- Static variable - Wikipedia - en.wikipedia.org
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