Does not writing return statement in void function occupies the stack memory?

Question

This is a simple recursive function of quicksort algorithm and I didn't find return statement in this function so will it not empty the stack after the last recursion?

void quicksort(int arr[], int p, int r){
    int q = partition(arr, p, r);
    if(p < r){
        quicksort(arr,p, q-1);
        quicksort(arr,q+1, r);
    }
}

This function has no return statemnt so will the recursive functions stay on the stack forever or will they ever get emptied?

Answer 1

The stack frame for the function is cleared when it eventually exits.

An explicit return statement is not necessary for this to happen; when the program flow comes across the closing brace the function will exit anyway, and its stack frame will be cleared.

Another typical way a function can exit without return (albeit not in C) is by throwing an exception; again, the stack frame will be cleared.