Difference between Java and JavaScript (how to find the average)

Simple but also output


import java.util.*;
public class Test12{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
int sum = 0; //Variables for storing totals
int a=0;
while (true) {
    System.out.println("Please enter the number repeatedly(End with 0 for total and average)"); //Add termination condition to message
    int num = scan.nextInt();
    if (num == 0) {
    } else {
        sum += num;
        a++;//Add until the end
//System.out.println("The total is"+sum);//
System.out.println("The average is"+sum/a);

This is an example.


<!DOCTYPE html>
<meta charset="UTF-8"/>
  <h1>Average calculation</h1>
  <input type="number" id="num" value="" placeholder="Enter a number"/>
  <button onclick="add()">Add</button>
  <button onclick="btCalc()">Calc!</button>
  <div id="msg"></div>
var nums=[];
var str="";
var eleNum=document.getElementById("num");
var eleMsg=document.getElementById("msg");
function add(){
//Converted to int but not Integer unlike Java

  var num=parseInt(eleNum.value);
  eleMsg.textContent=num+"To the array";
function btCalc(){
	var sum=0;
	for(var i=0;i<nums.length;i++){
	str +=nums[i]+(i==nums.length-1?"":",");
    sum +=nums[i];
	var msg='[{${nums.join(",")}]The average of${sum/nums.length}is.';

For the time being, var should be changed to block scope (let, const).

Speaking where I stumbled

'use strict';
  //dom get
  let ele=document.getElementById("bt");
  let result=document.getElementById("result");
  //Sets a function that is called each time a particular event is delivered to the target.

Execute the method after loading the HTML like? And. .. It was difficult to understand when considering the meaning and significance. ..

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