How to append something to an array?

Appending something to an array means adding a new element to the end of that array. The method you use depends on the programming language you're working with. Here's a quick breakdown of how you can do this in some popular languages:

 Python

Use the append() method:

my_list = [1, 2, 3]

my_list.append(4)  # [1, 2, 3, 4]

For adding multiple items, use extend():

  my_list.extend([5, 6])

 JavaScript

Use the push() method:

let arr = [1, 2, 3];

arr.push(4);  // [1, 2, 3, 4]

You can also use the spread operator:

  arr = [...arr, 5];  // [1, 2, 3, 4, 5]

 Java

Use ArrayList for dynamic arrays:

ArrayList list = new ArrayList<>();

list.add(1);

list.add(2);

Things to Remember:

• Arrays in some languages like Java or C have fixed sizes, so you’ll need to use dynamic structures like ArrayList or manually create a new array with a larger size.
  
• In scripting languages like Python and JavaScript, arrays (or lists) grow dynamically.