Java inputs an integer array and finds the sum and average of the array

Input an array of integers and find the sum and average of the array.

For example, if you input an array of length 2, the program runs as follows:

【code show as below】:

import java.util.Scanner;
public class NumArray{
  public static void main(String[] args){
    System.out.print("请输入数组中元素个数：");
    Scanner sc=new Scanner(System.in);
    int num=sc.nextInt();
    int sum=0;
    for(int i=1;i<=num;i++){
      System.out.print("请输入第"+i+"个元素：");
      int n=sc.nextInt();
      sum=sum+n;
    } 
    System.out.println("数组的和为"+sum);
    System.out.println("数组的平均值为"+1.0*sum/num);
  }
}