What happens to memory of variable after loops? (C++)

Question

i'm trying to understand how C++ works. When u declare a new variable (int x) within a loop, for example within a for-loop. Memory is allocated to the variable x within the loop, but what happens to that memory after exiting the for-loop? My understanding from a friend is that Java will automatically de-allocate the memory, but what about C++?

Thanks.

Answer 1

It will be deallocated if declared on stack (i.e. via int x = ...) and when the variable leaves its scope. It won't be deallocated if declared on heap (i.e. via int *x = new int(...)). In that case you have to explicitely use delete operator.