Your question is very hard to read, and I see no reason why it should be all bold....

print "no" is an expression which returns 1 (print successful), and which prints no as a side effect. The (outer) print than has "yes", 1 as the argument list, so it prints yes1

The second example can be explained along the same lines: exit is evaluated before the print, and since it quits the program, the print isn't evaluated at all.