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#break:终止程序,跳出循环 #next:跳到下一个循环,本次循环结果不做处理 #redo:在相同的条件下重复刚才的处理 i = 0 names = ["Perl","Pyhton","Ruby","Scheme"] names.each do |x| i += 1 if i == 3 break end p [i,x] end i = 0 names = ["Perl","Pyhton","Ruby","Scheme"] names.each do |x| i += 1 if i == 3 next end p [i,x] end i = 0 names = ["Perl","Pyhton","Ruby","Scheme"] names.each do |x| i += 1 if i == 3 redo end p [i,x] end