Can someone explain me what is dangling pointer in C language?

Hi
Can someone explain me what is dangling pointer in C language?

A dangling pointer is when you have 1 or more pointers to memory that has been freed, but the pointer(s) still points to the memory block that used to be allocated. Typically the programmer will set one of the pointers to NULL when it is freed but another pointer is still pointing to the old memory block that the programmer is unaware of.