Convert hex to ASCII

Hex to ASCII Conversion in Swift.swift

let asciiValue: String = "1234567890ABCDEFGHIJ"

func asciiToHex(_ asciiValue: String) -> String {
    let chars: [String.Element] = Array(asciiValue)
    var hex: String = ""
    for char: String.Element in chars {
        hex += String(char.asciiValue!, radix: 16)
    }
    return hex
}

let result = asciiToHex(asciiValue)
print(result)