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Huseyn Guliyev
Huseyn Guliyev
2,603 Points
Posted by Huseyn Guliyev
Huseyn Guliyev
2,603 Points

Arrays and Dictionaries

I know this is not the right place to ask, but I am going to do it anyway. What is the difference between an array and a dictionary?

1 Answer

Jhoan Arango
MOD
Jhoan Arango
Treehouse Moderator 13,603 Points
Jhoan Arango
Jhoan Arango
Treehouse Moderator 13,603 Points

This is the right place to ask...

An array stores values of the same type in order. A dictionary also stores values but with a key on them, this is called a key value pair, and they are not ordered in a particular way.

Examples: 

// Array

let numbers: [Int] = [1,2,3,4,5,6,7,8,9]

// To get a value from the array,
// we use the index where the value is at.
// If we want the first value we use "0"

let one = numbers[0]
print(one) // This will print the number 1

// Dictionary

let numbersDictionary: [String: Int] = ["one" : 1, "two" : 2, "three": 3]

// To get a value from the dictionary,
// we use the key for the value.

let three = numbersDictionary["three"]!
print(three) // this will print the number 3