I created a char array like so:
char arr[3] = \"bo\";
How do I free the memory associated with array I named \"arr\"?
The memory associated with arr is freed automatically when arr goes out of scope. It is either a local variable, or allocated statically, but it is not dynamically allocated.
A simple rule for you to follow is that you must only every call free() on a pointer that was returned by a call to malloc, calloc or realloc.