["Hip", "hip", "array!"] We have learned about how to store groups of data into arrays in Swift. πŸ™Œ

Here are some of the things that we covered:

  • An array is a list of ordered items.
    var evenNumbers = [2, 4, 6, 8, 10]
  • The first index in an array is 0.
  • The .count property that returns the size of an array.
  • Some of the methods that come with arrays:
    • .append(): adding an item to the end
    • .insert(): adding an item to an index
    • .remove(): removing an item from an index
  • The for-in loop can be used to iterate through an array.

Download the Arrays: Cheat Sheet for referencing the content covered in this lesson.



Optional: Write a Swift program to find the sum of even numbers and the product of odd numbers in an array.

For example, suppose we have an array that is [2, 4, 3, 6, 1, 9], then the program should output:

Sum of even numbers is 12 Product of odd numbers is 27

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