JAVA-do...While循环

do...while循环

do ...while最少执会行一次

结构：先执行后判断

do {
	//代码语句
}while(布尔表达式);

代码演示：

public class rug {
    public static void main(String[] args) {
        int i = 0;
        int sum = 0;
        do {
            sum = sum + i;
            i++;
        }while(i<=100);
        System.out.println(sum);
    }
}

while循环和do...while循环比较

public class rug {
    public static void main(String[] args) {
        int i = 0;
        while (i<0){	//while循环
            System.out.println(i);
            i++;
        }
        System.out.println("分割线-----------------------------");
        do {		//do...while循环
            System.out.println(i);
            i++;
        }while (i<0);
    }
}