Contents

subscript(_:)

Accesses the character at the given position.

Declaration

subscript(i: String.Index) -> Character { get }

Parameters

  • i:

    A valid index of the string. i must be less than the string’s end index.

Overview

You can use the same indices for subscripting a string and its substring. For example, this code finds the first letter after the first space:

let str = "Greetings, friend! How are you?"
let firstSpace = str.firstIndex(of: " ") ?? str.endIndex
let substr = str[firstSpace...]
if let nextCapital = substr.firstIndex(where: { $0 >= "A" && $0 <= "Z" }) {
    print("Capital after a space: \(str[nextCapital])")
}
// Prints "Capital after a space: H"

See Also

Getting Characters and Bytes