4 ms·but howby Aperocky 7y agobut howtaneq 7y agoWell, it all started when they used recursion.eru 7y agoIt's useful if your recursion does some work before recursing. (Just like your loop bodies should do something.)smabie 7y agoWhat's interesting is that church numerals don't do anything except "recurse." So calling a function that does nothing is useful after all!eru 7y agoChurch Numerals apply the function you give them, n-times. That's hardly nothing.