Beginning Swift

Arrays

An array is an ordered collection of elements of the same type, and they are used for pretty much anything that requires storing things in a certain order, such as the contents of lists in apps. It works like similar types in other languages.

Working with Arrays

Follow these steps to work with arrays:

1. We can create an array like this:

   let a = [0,1,2,3,4] // array literal

2. We can join two arrays like this:

   var b = a + [5,6]   // join two arrays

3. We can have a repeated value like this:

   let c = Array(repeating: 4.1, count: 3) // repeat one value

4. To create an array from any sequence, we can do this:

   // create from any Sequence (a String is a Sequence of Character)
   var d = Array("The ☀ and 🌙 ")

5. To append a value to an array, use this:

   b.append(10) // append ...