Question

How to check if a string contain only two same repeating characters in C#

Answer 1

using System;
  
class Program
{
    static bool contain_only_two_same_repeating_chars(string s)  {  
        int len = s.Length;
        if (len % 2 != 0) return false;
        for (int i = 0; i < len - 2; i++) {  
            if (s[i] != s[i + 2]) {  
                return false;  
            }  
        }  
        return true;  
    }  
    static void Main() {
        string s = "abababab";  
        
        if (contain_only_two_same_repeating_chars(s))  
            Console.WriteLine("Yes");  
        else
            Console.WriteLine("No");  
    }
}
  
  
  
/*
run:
  
Yes
  
*/

 

70+ SQL courses for beginners and professionals