Java array element summing method

Requirements

1. Enter 5 integers on the keyboard, store them in the array, and sum them with the array.

Process

2. Create a keyboard input object and prepare for keyboard input.

Define a summation variable to record the cumulative results.

Dynamically initialize an int array with a length of 5, ready to store keyboard input values.

Store the numbers entered by the keyboard in an array.

Traverse the array, take out each element, and sum it.

Output.

Example

package com.itheima.test;
 
import java.util.Scanner;
 
public class Test3Array {
    /*
        需求：键盘录入5个整数，存储到数组中，并对数组求和
 
        思路：
            1.创建键盘录入对象，准备键盘录入
            2.定义一个求和变量，准备记录累加后的结果
            3.动态初始化一个长度为5的int数组，准备存储键盘录入的数值
            4.将键盘录入的数值存储到数组中
            5.遍历数组，取出每一个元素，并求和
            6.输出总和
     */
    public static void main(String[] args) {
        // 1.创建键盘录入对象，准备键盘录入
        Scanner sc = new Scanner(System.in);
        // 2.定义一个求和变量，准备记录累加后的结果
        int sum = 0;
        // 3.动态初始化一个长度为5的int数组，准备存储键盘录入的数值
        int[] arr = new int[5];
        // 4.将键盘录入的数值存储到数组中
        for(int i = 0; i < arr.length; i++){
            System.out.println("请输入第" + (i+1) + "个整数:");
            //arr[i] = 10;
            arr[i] = sc.nextInt();
        }
 
        // 5.遍历数组，取出每一个元素，并求和
        for (int i = 0; i < arr.length; i++) {
            sum += arr[i];
        }
 
        // 6.输出总和
        System.out.println("sum:" + sum);
 
    }
}

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