Subscript

subscript(_:)

Accesses the Unicode scalar value at the given position.

Declaration

subscript(position: String.UnicodeScalarView.Index) -> Unicode.Scalar { get }

Parameters

position

A valid index of the character view. position must be less than the view’s end index.

Discussion

The following example searches a string’s Unicode scalars view for a capital letter and then prints the character and Unicode scalar value at the found index:

let greeting = "Hello, friend!"
if let i = greeting.unicodeScalars.firstIndex(where: { "A"..."Z" ~= $0 }) {
    print("First capital letter: \(greeting.unicodeScalars[i])")
    print("Unicode scalar value: \(greeting.unicodeScalars[i].value)")
}
// Prints "First capital letter: H"
// Prints "Unicode scalar value: 72"

Relationships

From Protocol