小编bba*_*ahd的帖子

我想使用基本循环求和，所以我使用了以下代码：

// sum of first n terms in the series, 1 - 1/1! + 2/2! - 3/3!...
package assignment02;
import java.util.Scanner;
public class P7Bnew {

    public static void main(String[] args) {
        Scanner in = new Scanner (System.in);
        System.out.println("Enter number of terms.");
        int n = in.nextInt();
        
        // using for loop to find sum
        double sum =1;
        for (int i =1; i<n ; i++)
        {
            int fact = 1;
            for (int j=1; j<=i; j++)
            {
                fact *= i;
            }
            if (i%2==0)
                sum+= …