Declaring variables inside or outside of a loop

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后悔当初
后悔当初 2020-11-22 01:59

Why does the following work fine?

String str;
while (condition) {
    str = calculateStr();
    .....
}

But this one is said to be dangerou

20条回答
  •  隐瞒了意图╮
    2020-11-22 02:39

    These two examples result in the same thing. However, the first provides you with using the str variable outside of the while loop; the second is not.

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