Hi i'm a newbie in c# and i'm trying to write trimleft function by myself

Question

public static string TrimLeft(string word)
    {
        int numberOfLetters = 0;
        foreach (var c in word)
        {
            numberOfLetters++;
        }

        int start = 0, end = numberOfLetters - 1;
        string b = "";
        for (int i = 0; i < numberOfLetters; i++)
        {
            if (!char.IsWhiteSpace(word[i]))
           {
                start = i;

                b += word[i];
            }
            
        }


        Console.WriteLine("Trimmed version: {0}", b);
        return word;
    }

i'm trying to write trimleft function by myself i couldnt quite figure out how i did the normal trim version but how can i do the trimleft version of it without using any inbuilt string. functions like substring etc.

Answer 1

this is a shorter version, it was tested and working properly

public static string TrimLeft(string word)
{
    string result = "";
    bool trimDone = false;

    foreach (var chr in word)
    {
        if (chr == ' ' && !trimDone) continue;
            result = result + chr;
            trimDone = true;
    }
    Console.WriteLine("Trimmed version: {0}", result);
    return result;
}

test

var word = "  abc def !";
word = TrimLeft(word);

result

abc def !

Somebody could suggest a string builder, but as I understand it is out of the scope of the project

also there is another version but I think that it is out of the scope too

public static string TrimLeft(string word)
{
    var i = 0;
    foreach (var chr in word)
    {
      if (chr != ' ')
      {
         if ( i > 0)
            {
                Console.WriteLine($"Trimmed version:{word[i..]}");
                return word[i..];
            }
            else break;
        }
        i++;
    }
    Console.WriteLine($"Nothing To Trim : {word}");
    return word;
}