Starting issue

You say that if you have a start problem, what you can do is to check for Internal Engine Damage - If your engine has had a major malfunction it will not turn over. To check for this condition install a socket wrench on the front crankshaft bolt, then try to rotate. The engine will turn with a certain degree of difficulty but it should rotate a full 360 degrees (clockwise). If the engine doesn't turn disassembly is required, repair as needed and reassemble. My question: if you have to rotate the front crankshaft bolt, do you have to rotate it clockwise? Or anticlockwise (meaning unscrewing the bolt?). If it is clockwise, then I assume that the bolt does rotate alone and at a certain point it does the crankshaft rotating? Thank you!