Create and Modify Strings in Swift

Written by Team Kodeco

Strings in Swift are a collection of characters in a specific order. Strings are used to store and manipulate text.

String are value type in swift, meaning they are copied when they are assigned to a new variable or passed to a function.

Let’s review some of the most common operations you might want to do with Strings in Swift.

Creating a String

Here’s how to create a string in swift:

// Creating an empty string
var emptyString = ""

// Creating a string with a string literal
var greeting = "Hello, World!"

Get the Length of a String

You can get the length of a string with count:

var greetingLength = greeting.count // 13

Using String Interpolation

You can use string interpolation to include the value of variables in a string:

let name = "Bob"
print("Hello, \(name)!")
// Output: "Hello, Bob!"

Concatenating Strings

You can concatenate strings together with the + operator:

let firstName = "Bob"
let lastName = "Smith"
let fullName = firstName + " " + lastName
print(fullName)
// Output: "Bob Smith"

Appending Strings

You can append to a string with the += operator or with append:

var name = "Bob"
name += " "
name.append("Smith")
print(name)
// Output: "Bob Smith"

The rest of this section of the cookbook will go into more detail about how to use Strings in Swift.