Peek and Poke available ?

Noob question probably...

Are there functions for peeking / poking into RAM ?

I know, I'll have to be careful...

Just define a pointer, point it somewhere, and dereference it.

C is one of the few languages that has allows code to directly set the value of a pointer to directly access RAM or memory mapped I/O (Pascal has pointers set by new())

Thanks, forgot that a sketch is just C