How to convert a decimal number to binary in Swift?

Question

How can I convert Int to UInt8 in Swift? Example. I want to convert number 22 to 0b00010110

var decimal = 22 var binary:UInt8 = ??? //What should I write here? 

Answer 1

You can convert the decimal value to a human-readable binary representation using the String initializer that takes a radix parameter:

let num = 22 let str = String(num, radix: 2) print(str) // prints "10110" 

If you wanted to, you could also pad it with any number of zeroes pretty easily as well:

Swift 5

func pad(string : String, toSize: Int) -> String {   var padded = string   for _ in 0..<(toSize - string.count) {     padded = "0" + padded   }     return padded }  let num = 22 let str = String(num, radix: 2) print(str) // 10110 pad(string: str, toSize: 8)  // 00010110