如何正确地将数据添加到数组

let myArray = [1, 2, 3];
myArray.push(4);
console.log(myArray); // [1, 2, 3, 4]

myList = [1, 2, 3]
myList.append(4)
print(myList)  # [1, 2, 3, 4]

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> myList = new ArrayList<>();
        myList.add(1);
        myList.add(2);
        myList.add(3);
        myList.add(4);
        System.out.println(myList);  // [1, 2, 3, 4]
    }
}

using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<int> myList = new List<int>();
        myList.Add(1);
        myList.Add(2);
        myList.Add(3);
        myList.Add(4);
        Console.WriteLine(string.Join(", ", myList));  // 1, 2, 3, 4
    }
}