✅ Caesar Cipher Code with Weird Behavior

// Pre-defining the ordered alphabets and integers for ease of access in all functions that need it
string[] upperAlphabet = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};
string[] lowerAlphabet = {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};
int[] integers = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

// Start is called before the first frame update
void Start()
{
    
}   

// Update is called once per frame
void Update()
{
    
}

// Decodes an input string 'encodedStr' by moving letters forward 'shuffle' times, e.g. if shuffle = 5, a -> f
public string caesarCipher(string encodedStr, int shuffle)
{
    string decodedStr = "";
    foreach(char ch in encodedStr)
    {
        // Digits remain unchanged
        if(Char.IsDigit(ch))
        {
            decodedStr += ch;
        } else if(Char.IsUpper(ch))
        {
            // Takes the index of the char in the ENCODED string, adds that (also works with negative numbers) to the index, and adds the new char in the array to 'decodedStr'
            char newCh = Convert.ToChar(upperAlphabet[(Array.IndexOf(upperAlphabet, ch) + shuffle)]);
            decodedStr += newCh;
        } else if(Char.IsLower(ch))
        {
            char newCh = Convert.ToChar(lowerAlphabet[(Array.IndexOf(lowerAlphabet, ch) + shuffle)]);
            decodedStr += newCh;
        }
    }
    return decodedStr;
}

Console.WriteLine(caesarCipher("hello world", 3));

// Pre-defining the ordered alphabets and integers for ease of access in all functions that need it
string[] upperAlphabet = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};
string[] lowerAlphabet = {"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"};
int[] integers = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

// Start is called before the first frame update
void Start()
{
    
}   

// Update is called once per frame
void Update()
{
    
}

// Decodes an input string 'encodedStr' by moving letters forward 'shuffle' times, e.g. if shuffle = 5, a -> f
public string caesarCipher(string encodedStr, int shuffle)
{
    string decodedStr = "";
    foreach(char ch in encodedStr)
    {
        // Digits remain unchanged
        if(Char.IsDigit(ch))
        {
            decodedStr += ch;
        } else if(Char.IsUpper(ch))
        {
            // Takes the index of the char in the ENCODED string, adds that (also works with negative numbers) to the index, and adds the new char in the array to 'decodedStr'
            char newCh = Convert.ToChar(upperAlphabet[(Array.IndexOf(upperAlphabet, ch) + shuffle)]);
            decodedStr += newCh;
        } else if(Char.IsLower(ch))
        {
            char newCh = Convert.ToChar(lowerAlphabet[(Array.IndexOf(lowerAlphabet, ch) + shuffle)]);
            decodedStr += newCh;
        }
    }
    return decodedStr;
}

Console.WriteLine(caesarCipher("hello world", 3));