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第 13 期(2019-05-20):无返回值的语句 #15

@AMY-Y

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@AMY-Y
        基础
        


        1 请写出四种无返回值的四种语句
        2 判断在浏览器控制台执行以下代码的结果,同时写出原因
        eval('1+2;var x=5;;;;;;function fn(){};');
        eval('1+2;var x=5;;;;;;function fn(){};void 0');

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