What is the replacement for isDigit() for characters in Swift?

Question

As mentioned in this post, before Xcode 6 Beta 4, one could use c.isDigit() and c.isAlpha() to find if c : Character was a digit or al

Answer 1

With Swift 5, according to your needs, you may choose one of the following ways in order to solve you problem.

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#1. Using Character's isNumber property

Character has a property called isNumber. isNumber has the following declaration:

var isNumber: Bool { get }

A Boolean value indicating whether this character represents a number.

The Playground sample codes below show how to check if a character represents a number using isNumber:

let character: Character = "9"
print(character.isNumber) // true

let character: Character = "½"
print(character.isNumber) // true

let character: Character = "④"
print(character.isNumber) // true

let character: Character = "1⃣"
print(character.isNumber) // true

let character: Character = "1️⃣"
print(character.isNumber) // true

let character: Character = "৯"
print(character.isNumber) // true

let character: Character = "