差异一目了然了。。 a和c 都被赋值为了7,但第2行和第4行是没有打印值的。 b和d的赋值在第3行和第5行运行时打印了结果,但本身值都为none,并没有被赋值成功。 这里就要提到其中一. 48 人赞同了该回答 这句诗的原话是 the world has kissed my soul with its pain, asking for its return in songs. 其实这不是 return 语句后加 if else,实际上对于大部分编程语言而言,return 表示代码运行到次结束,而后面的代码是不会被执行的。 现在回到问题,为什么可以这样写,其.
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Rate of return, irr):说的是累计净现值为0的时候的贴现率。 这个内部报酬率的意思就是项目能承受的最大货币贬值的比率。
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