Discuss / Java / 作页
Back

作页

Topic source

Reason

#1 Created at ... [Delete] [Delete and Lock User]

sum = (n + 1) * n / 2

凡昊科技袁工

#2 Created at ... [Delete] [Delete and Lock User]

int sum = 0;

for (int i = 0; i <= n; i++) {

sum += i;

}

Tan

#3 Created at ... [Delete] [Delete and Lock User] 
import java.util.Scanner;public class test {    //计算前N个自然数的和    public static void main(String[] args) {        //键盘输入N        Scanner scanner = new Scanner(System.in);        System.out.print("请输入N:");        int n = scanner.nextInt();        //计算前N个自然数的和        int sum = 0;        for (int i = 0; i <= n; i++) {            sum += i;        }        System.out.println("前N个自然数的和为："+sum);    }}
  • 1

Reply