when does a array act as a pointer in c?

Question

i know that the array name could be used as a pointer(although it's a converted form), but my question is , Is there some other instance where array acts as a pointer.

Answer 1

Technically speaking, an array name never acts as a pointer. An expression with array type (which could be an array name) will convert to a pointer anytime an array type is not legal, but a pointer type is. And the declaration of an array as a function parameter is converted into a declaration of a pointer. (Which means that the name isn't an array name, but a pointer name. Despite appearances.)

Answer 2

It is due to array-to-pointer standard conversion. Specifically, array decays into a pointer to the first element of the array.

Array decays into a pointer, I think, because arrays and pointers are used exactly in the same way: using an index, which you can increment and decrement, to traverse the elements, in both direction, forward and backward..