A character in Swift is a
single character String literal, addressed by the data type character.
Take a look at the following example. It uses two Character constants
import Cocoa
let char1: Character = "A"
let char2: Character = "B"
println("Value of char1 \(char1)")
println("Value of char2 \(char2)")
Result:
Value
of char1 A
Value
of char2 B
If you try to store more than one
character in a Character type variable or constant, then Swift will not allow
that. Try to type the following example in Swift Playground and you will get an
error even before compilation.
import Cocoa
// Following is wrong in Swift
let char: Character = "AB"
println("Value of char \(char)")
Empty Character Variables
It is not possible to create an
empty Character variable or constant which will have an empty value. The
following syntax is not possible:
import Cocoa
// Following is wrong in Swift
let char1: Character = ""
var char2: Character = ""
println("Value of char1 \(char1)")
println("Value of char2 \(char2)")
Accessing Characters from Strings
As explained while discussing
Swift's Strings, String represents a collection of Character values in a
specified order. So we can access individual characters from the given String
by iterating over that string with a for-in loop −
import Cocoa
for ch in "Hello" {
println(ch)
}
Result:
H
e
l
l
o
Concatenating Strings with Characters
The following example demonstrates
how a Swift's Character can be concatenated with Swift's String.
import Cocoa
var varA:String = "Hello "
let varB:Character = "G"
varA.append( varB )
println("Value of varC
= \(varA)")
Result:
Value
of varC Hello G
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