Question

java中求1到100的累加（用数组形式）？

Answer 1

int sum=0;
for(int i=0;i<101;i++)
{
sum+=i;
}
System.out.print("结果是："+sum);

Answer 2

int []a= new int(100);
for(int i=0;i<100;i++)
{
a[i]=i+1;
}
int sum=0;
for(int i=0;i<100;i++)
{
sum+=a[i];
}
System.out.println(sum);

Answer 3

public class Add{
public static void main(String arg[]){
int sum = 0;
int number[] = new int[100];
for(int i=1;i<=100;i++){
number[i-1]=i;
sum += number[i-1];
}
System.out.println("sum="+sum);
}
}