In GDB, what does *(x+value) = value do?

Question

I understand that

* = dereference

*x = dereferencing x to grab the value in x if x is a pointer.

*x = 5 , set x = 5 if x is a pointer and a variable x exists.

What does the +value portion do here?

Ie. 

x = 5 

*ptr;

ptr = &x

*ptr gives us 5.

Answer 1

x + 5 adds 5*sizeof(*x) to the value of x and dereferences that location.

*(x + 5) is exactly equivalent to x[5] .