A Function that calculates which characters occur in a string, as well as how often each of these characters occur

Occurrences of characters.swift

func occurrencesOfCharacters(in text: String) -> [Character: Int] {
    var dict: [Character: Int] = [:]
    for key in text {
        if dict[key] == nil {
        dict[key] = 1
        }else{
            dict[key]! += 1
        }
        
    }
    return dict
}



occurrencesOfCharacters(in: "abc bdccc")