Sometimes I find myself frequently alternating between two functions that I am editing in conjunction with each other. In these situations, it is tedious and painful to keep on doing a C-s <functionname> to switch to the other function and then to find the exact place I was editing previously.

Is there a command in emacs to set one or two markers and then to jump back and forth between two locations in a file with ease?

Sometimes I find myself frequently alternating between two functions that I am editing in conjunction with each other. In these situations, it is tedious and painful to keep on doing a C-s <functionname> to switch to the other function and then to find the exact place I was editing previously.

How do I set markers and then jump back and forth between two locations in the buffer with ease?