Both functions have the same functionality and end result, but I think my implemenation is more readable, making it easier to maintain and debug.

The use of the "for" loop makes the code more straightforward and eliminates the need for advanced string manipulation techniques, making it the better choice in my opinion.

The best part of the solution is that it reaches the result sequentially without looping.

Please don't force unwrap <3

Thank you! :D

Fixed

Great code illustrating stepwise solution.

Getting an annoying error on Swift

main.swift:64:23: error: use of unresolved identifier 'Base64Chars'
                        returnChars[i*4] = Base64Chars[char1 >> 2]
                                           ^~~~~~~~~~~
main.swift:6:13: note: did you mean 'base64Chars'?
        static let base64Chars: [UInt8] = Array("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".utf8)
                   ^
                   ```