为scheme添加for循环语句
有三个辅助关键字in, from和to能够 break和continue语法有三种(for n in '(1 2 3 4 5 6 7 8 9 10) (if (> n 8) (break #f)) (if (even? n) (continue #f)) (display n) (display " "))=> 1 3 5 7 #f(for n from 1 to 100 (...
