break,next,redo,retry的应用
=beginbreak ， next , redo , retry在循环体内，如果遇到：break ，跳出当层循环；next ，忽略本次循环的剩余部分，开始下一次的循环；redo ，重新开始循环，还是从这一次开始；retry ，重头开始这个循环体=end#break示例puts "演示break"c='a'for i in 1..4if i == 2 and c =='a'c = 'b'print "\n"breakendprint i,c," "endputs "\n\n"#next示例puts "演示next"c='a'for i in 1..4if i == 2 and c =='a'c = 'b'print "\n"nextendprint i,c," "endputs "\n\n"#redo示例puts "演示redo"c='a'for i in 1..4if i == 2 and c =='a'c = 'b'print "\n"redoendprint i,c," "endputs "\n\n"#retry示例puts "演示retry"c='a'for i in 1..4if i == 2 and c =='a'c = 'b'print "\n"retryendprint i,c," "endputs "\n\n"
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