What is variable scope and lifetime in programming?
An example of an AI chatbot conversation about variable scope and lifetime in programming.
What is variable scope and lifetime in programming?
Variable scope refers to the accessibility of a variable in different parts of your code, while lifetime refers to how long a variable exists in memory.
Can you explain the difference between local and global variables?
Sure! Local variables are defined within a function and can only be accessed there, while global variables are defined outside any function and can be accessed from anywhere in the code.
What happens to a variable's lifetime when a function exits?
When a function exits, local variables are destroyed, and their memory is freed, while global variables remain in memory until the program ends.
Are there any exceptions to this rule?
Yes, in some programming languages, variables can have static or persistent storage duration, meaning they retain their value even after the function exits.
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