“做什么"是什么意思在这里吗?(java) [英] what does "do" do here? (java)

问题描述

我在某处的Interent上看到了这段代码.我想知道 do 是做什么的.

I saw this bit of code on the interents somewhere. I'm wondering what the do is for.

public class LoopControl {
    public static void main(String[] args) {
        int count = 0;

        do {
            if (count % 2 == 0) {
                for (int j = 0; j < count; j++) {
                    System.out.print(j+1);

                    if (j < count-1) {
                        System.out.print(", ");
                    }
                }

                System.out.println();
            }

            count++;
        }
        while (count <= 5);
    }
}

我的意思是的确切含义是什么?它的作用是什么?任何其他信息也将有用.

By which I mean what exactly does do mean? What's its function? Any other information would be useful, too.

推荐答案

这是一个do-while循环.因此，当count小于或等于5时，它将在接下来的块中执行所有操作.此计数与正常的while循环之间的区别是，条件是在循环结束而不是开始时求值的.因此确保该循环至少执行一次.

It is a do-while loop. So it will do everything in the following block while count is less than or equal to 5. The difference between this and a normal while loop is that the condition is evaluated at the end of the loop not the start. So the loop is guarenteed to execute at least once.

Sun教程同时进行和执行.

哦，在这种情况下，它将打印:

Oh, and in this case it will print:

1, 2
1, 2, 3, 4

只是您知道一开始还会有新行，但是格式似乎没有让我证明这一点.

just so you know there will also be a new line at the start, but the formatting doesn't seem to let me show that.

这篇关于“做什么"是什么意思在这里吗?(java)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！