How to convert a decimal number to binary in swift

Image Excerpt From: Apple Inc. “The Swift Programming Language (Swift 5.3).” Apple Books. https://books.apple.com/us/book/the-swift-programming-language-swift-5-4/id881256329

//
//  main.swift
//  Ultimate
//
//  Created by Mewlan Musajan on 5/7/21.
//
//  Excerpt From: SINKUK KANG “How to convert a decimal number to binary in Swift?” stackoverflow. https://www.xspdf.com/help/51882984.html

extension BinaryInteger {
    var binaryDescription: String {
        var binaryString = ""
        var internalNumber = self
        for _ in (1...self.bitWidth) {
            binaryString.insert(contentsOf: "\(internalNumber & 1)", at: binaryString.startIndex)
            internalNumber >>= 1
        }
        return "0b" + binaryString
    }
}

print(Int8(~0b00001111).binaryDescription)