Question

用java利用for循环 计算1+2+3+4+5+。。。+100的总和！！

和do while循环 计算1+2+3+4+5+。。。+100的总和！！

Answer 1

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

Answer 2

int sum=0；
for(int i=1;i<=100;i++){
sum+=i;
}
System.out.println("sum="+sum);

Answer 3

public
class Test {

/**

*@paramargs

*/

publicstaticvoid main(String[] args) {

int sum =0;

int num = 1;

do{

sum = sum + num;
num++;
}
while(num <= 100);

System.
out.println("Sum is: " + sum);

}

}

Answer 4

int sum=0；
for(int i=1;i<=100;i++){
sum+=i;
}
System.out.println("sum="+sum);

int i=1;
int s=0;
do{
s+=i;
i++;
}while(i<=100);

Answer 5

int i=1;
int num=0;
do {
num+=i;
i++;
} while (i<=100);
System.out.println(num);

--for循环
int sum =0;
for(int i=1;i<=100;i++){
sum+=i;

}
System.out.println(sum);