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课堂总结

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#1 Created at ... [Delete] [Delete and Lock User]

while (条件) {

循环体内容

}

1.条件边界值得小心

2.不要写死循环

3.先判断条件再循环

public class Main {    public static void main(String[] args) {        int sum = 0;        int m = 20;        int n = 100;        // 使用while计算M+...+N:        while (m<=n) {            sum=sum+m;            m++;        }        System.out.println(sum);    }}

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