//Count the occurrence of each character in a string and output the count by character?

//Example - HELLO

//H-1

//E-1

//L-2

//O-1 

​

using System.Collections.Generic;

using static System.Console;

​

var input = "HELLO";

Dictionary<char, int> counts = new();

​

for(var i = 0;i < input.Length; i++) 

{

    var currentChar = input[i];

    if(counts.ContainsKey(currentChar))

        counts[currentChar] += 1;

    else

        counts.Add(currentChar, 1);

}

​

foreach(var kv in counts)

    WriteLine($"{kv.Key} - {kv.Value}");