JAVA 用for/while循环打印1-100相加

1.for循环：
public class test1 {
    public static void main(String[] args) {
        int sum=0;
        for (int i=1;i<=100;i++){
            sum+=i;
        }
        System.out.println("sum="+sum);
    }
}

2.while循环：

public class test1 {
    public static void main(String[] args) {
        int sum=0;
        int i=1;
        while (i<=100){
            sum+=i;
            i++;
        }
        System.out.println("sum="+sum);
    }
}