Check out example codes for "swift append to array". It will help you in understanding the concepts better.

Code Example 1

//To add a new element to the end of an Array.
anArray.append("This String")

//To append a different Array to the end of your Array.
anArray += ["Moar", "Strings"]
anArray.append(contentsOf: ["Moar", "Strings"])

// To insert a new element into your Array.
anArray.insert("This String", at: 0)

// To insert the contents of a different Array into your Array.
anArray.insert(contentsOf: ["Moar", "Strings"], at: 0)

Code Example 2

var numbers = [1, 2, 3, 4, 5]
// Prints "[1, 2, 3, 4, 5, 100]"

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