What is the difference between memmove and memcpy?

Question

What is the difference between memmove and memcpy? Which one do you usually use and how?

Answer 1

memmove can deal with overlapping source and destination regions, while memcpy cannot. Among the two, memcpy is much more efficient. So, better to USE memcpy it if you can.

Reference: https://www.youtube.com/watch?v=Yr1YnOVG-4g Dr. Jerry Cain, (Stanford Intro Systems Lecture - 7) Time: 36:00