Java基础系列（20）- while循环

while(布尔表达式){
   //循环内容
}

package struct;

public class WhileDemo01 {

    public static void main(String[] args) {

        int i = 0;
        int sum = 0;
        while (i <= 100){
            sum = sum + i;
            i++;
        }
        System.out.println(sum);
    }
}