How to find Occurrences of a character in a String C#

In this article, we will see How to find Occurrences of a character in a String C# ? 

There are multiple ways to find the Occurrences of a character in a String C# however we need to use best and optimized performance oriented way to achieve this functionality. 

Using Basic Approach/Logic: 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace count_occurence_of_char_using_basic_logic

{

    class Program

    {

        static void Main(string[] args)

        {

            string _str = "occurences";

            Console.WriteLine("String: " + _str);

            while (_str.Length > 0)

            {

                Console.Write(_str[0] + " = ");

                int count = 0;

                for (int j = 0; j < _str.Length; j++)

                {

                    if (_str[0] == _str[j])

                    {

                        count++;

                    }

                }

                Console.WriteLine(count);

                _str = _str.Replace(_str[0].ToString(), string.Empty);

            }

            Console.ReadLine();

        }

    }

}

Using Dictionary:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Count_occurences_of_char_using_dictionary_in_csharp

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.Write("Enter the string : ");

            string message = Console.ReadLine();

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

            foreach (char ch in message.Replace(" ", string.Empty))

            {

                if (dict.ContainsKey(ch))

                {

                    dict[ch] = dict[ch] + 1;

                }

                else

                {

                    dict.Add(ch, 1);

                }

            }

            foreach (var item in dict.Keys)

            {

                Console.WriteLine(item + " : " + dict[item]);

            }

            Console.ReadKey();

        }

    }

}

byAdmin

in C#

March 27, 2021

How to find Occurrences of a character in a String C#

In this article, we will see How to find Occurrences of a character in a String C# ?  There are multiple ways to find the Occurrences of a ...

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