simple solution for characters frequency in string object

Question

The task what I\'m trying to do is about showing up the frequency of every single characters from the string object, for the moment I\'ve done some part of code, just doesn\'t h

Answer 1

If you're looking to do it without Linq, then try

var charDictionary = new Dictionary<char, int>();
string sign = "attitude";
foreach(char currentChar in sign)
{
    if(charDictionary.ContainsKey(currentChar))
    { charDictionary[currentChar]++; }
    else
    { charDictionary.Add(currentChar, 1); }
}

Answer 2

You can easily do it using Linq like:

 string sign = "attitude";
 int count = sign.Count(x=> x== 'a');

or if you want all characters count then:

 string sign = "attitude";
 var alphabetsCount = sign.GroupBy(x=> x)
                          .Select(x=>new 
                                    {
                                      Character = x.Key, 
                                      Count = x.Count()
                                    });

Here is a working Example

UPDATE:

Without Linq you can do it with a loop and track it in a dictionary like:

string sign = "attitude";
Dictionary<char,int> dic = new Dictionary<char,int>();
foreach(var alphabet in sign)
{
    if(dic.ContainsKey(alphabet))
        dic[alphabet] = dic[alphabet] +1;
    else
        dic.Add(alphabet,1);
}

Here is Demo without Linq using Dictionary<>

Answer 3

class Program
    {
        static void Main(string[] args)
        {

            char ch;
            Console.Write("Enter a string:");
            string str = Console.ReadLine();
            for (ch = 'A'; ch <= 'Z'; ch++)
            {
                int count = 0;
                for (int i = 0; i < str.Length; i++)
                {
                    if (ch==str[i] || str[i] == (ch + 32))
                    {
                        count++;
                    }
                }
                if (count > 0)
                {
                    Console.WriteLine("Char {0} having Freq of {1}", ch, count);
                }
            }
            Console.Read();
        }
    }

Answer 4

Here's a non Linq way to get the counts of all the unique letters.

var characterCount= new Dictionary<char,int>();
foreach(var c in sign)
{
    if(characterCount.ContainsKey(c))
        characterCount[c]++;
    else
        characterCount[c] = 1;
}

Then to find out how many "a"s there are

int aCount = 0;
characterCount.TryGetValue('a', out aCount);

Or to get all the counts

foreach(var pair in characterCount)
{
    Console.WriteLine("{0} - {1}", pair.Key, pair.Value);
}