How to free memory from char array in C

Question

I created a char array like so   char arr 3     bo     How do I free the memory associated with array I named  arr

User · Answer

char arr 3     bo     The arr takes the memory into the stack segment  which will be automatically free  if arr goes out of scope

User · Answer

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

User · Answer

You don t free anything at all  Since you never acquired any resources dynamically  there is nothing you have to  or even are allowed to  free    It s the same as when you say int n   10   There are no dynamic resources involved that you have to manage manually

User · Answer

Local variables are automatically freed when the function ends  you don t need to free them by yourself  You only free dynamically allocated memory  e g using malloc  as it s allocated on the heap   char  arr   malloc 3   sizeof char    strcpy arr   bo           free arr     More about dynamic memory allocation  http   en wikipedia org wiki C dynamic memory allocation

[c] How to free memory from char array in C

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