Question

How to convert decimal number to binary in Swift

Answer 1

import Foundation

func decimalToBinary(_ number: Int) -> String {
    return String(number, radix: 2)
}

print(decimalToBinary(41)) 
print(decimalToBinary(255)) 



/*
run:

101001
11111111

*/

 

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Answer 2

import Foundation

func decimalToBinary(_ number: Int) -> String {
    return String(number, radix: 2)
}

func pad0(string : String, toSize: Int) -> String {
  var padded = string
  
  for _ in 0..<(toSize - string.count) {
    padded = "0" + padded
  }
  
  return padded
}


let decimal = 41

let str = decimalToBinary(decimal)
print(str) 

print(pad0(string: str, toSize: 8)  )



/*
run:

101001
00101001

*/

 

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