ConCat, Thanks, I did pass over ArtOfWarfare's mention of the OS X Man Pages and forgot to revisit it.
Is there a pdf or graphical viewer of it or are we talking about Terminal? Terminal command line would be okay - I did try "man 3 printf" which got no hit but "man printf" did, but I wonder if that's a bash result.
Sorry, I'm just learning the Mac environment, and thanks for your patience and help.