那个大师傅会用for语句做这个的！

        int sum = 0;
        for (int i = 1; i <= 100; i++) {
            sum+=i;
        }
        System.out.printf("sum:%d",sum);

int sum=0,i=0;
for(i=1;i<=100;i++)
{
sum+=i;
}

int sum=0;
        for (int i = 0; i <= 100; i++) {
            sum=sum+i;
        }

满意请采纳