C# Program to Find the Non Repeated Characters in a String

C# Program to Find the Non Repeated Characters in a String

Most of the IT companies check the coding skills and problem-solving skills as well along with the theoretical interview questions. Sometimes you are free to write the pseudo code and sometimes you are asked to write the complete program either on any paper or any editor. 

This question is asked in the coding interview to write the program. Here you can find the program as well as a live running program so that you can test the program immediately.

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Question: 

How can you find the non repeated characters or unique characters in a given string? Write a program to find the unique characters in a string.

C# Program To Find the Unique Characters in a String

       
 

// Author 	: Tech Point Fundamentals
// Website 	: www.techpointfunda.com
// Channel	: https://www.youtube.com/c/TechPointFundamentals
// Demo		: Non-Repeated Characters

using System;
using System.Collections.Generic;

public class Program
{
 public static void Main()
 {
   string inputString = "Tech Point Fundamentals";   
   
   Console.WriteLine("Input String : " + inputString);		
   Console.WriteLine("Non Repeated Character (Case Sensitive) List : \n");	
   NonRepeatedCharacters(inputString);
 }	  	
	
public static void NonRepeatedCharacters(string inputString)    
{               
  var charCountResult = CharCountDictionary(inputString);              
  
  foreach (var count in charCountResult)    
  {    
  	if(count.Value == 1)
  	{
  		Console.WriteLine(" {0} - {1} ", count.Key, count.Value);   
  	}
  }    
}    
	
public static SortedDictionary<char, int> CharCountDictionary(string input)    
{    
  SortedDictionary<char, int> countDict = new SortedDictionary<char, int>();    

  foreach (char item in input)    
  {    
  	if (!(countDict.ContainsKey(item)))    
  	{    
  		countDict.Add(item, 1);    
  	}    
  	else    
  	{    
  		countDict[item]++;    
  	}    
  } 
  return countDict;    
} 
}

Output: 

Input String : Tech Point Fundamentals

Non Repeated Character (Case Sensitive) List : 

F - 1 

P - 1 

T - 1 

c - 1 

d - 1 

h - 1 

i - 1 

l - 1 

m - 1 

o - 1 

s - 1 

u - 1

Live Demo

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