Swift Quick Syntax Reference

Chapter    6

Strings

A string is a sequence of characters, such as "Hello World!". Strings use the String data type, although you don’t need to specify the data type to use a string, as shown in Listing 6-1.

Listing 6-1. Declaring Strings

var s1 = "Hello World!"

Unicode Characters

Strings can include any Unicode characters. To write single-byte Unicode characters, you must include \x before the two hexadecimal digits. Two-byte Unicode characters are prefixed with \u before four hexadecimal digits, and four-byte Unicode characters have \U written before eight hexadecimal digits.

Listing 6-2 shows an example of using Unicode characters.

Listing 6-2. Unicode Characters

let percentage = "\x{25}"let snowflake = "\u{2744}"let heart = "\u{0001F497}" ...