Pgm to find how many unique alphabets present in String

Question

Hi Please give me logic or solution on above problem in c# Without using Linq eg. ihave string AABBCD O/p is Only unique characters : CD

Dharmraj Thakur · Answer

Hi Nilesh logic can be like this... static void Main( string [] args) { string str = 0AAABBCCCCDD ; char [] arr = str.ToCharArray(); StringBuilder sb = new StringBuilder(); foreach ( char item in arr) { int count = 0; for ( int i = 0; i { if (item == arr[i]) count++; } if (count == 1) sb.Append(item); } Console.WriteLine(sb.ToString()); Console.ReadKey(); }