to count number of 2's from 0 to 35

Question

Write a method to count the number of 2's between 0 and n. EXAMPLE: input: 35 output: 14 [list of 2's: 2 12 20 21 22 23 24 25 26 2728 29 32]

Vulpes · Answer

Try this: using System; using System.Collections.Generic; class Program { static void Main() { Console.Write(Enter n : ); int n = int.Parse(Console.ReadLine()); int num2s = 0; var list = new List (); for(int i = 0; i { string s = i.ToString(); foreach(char c in s) { if ( c == '2') { num2s++; if(!list.Contains(s)) list.Add(s); } } } Console.WriteLine(num2s); Console.Write([list of 2's: ); Console.Write(String.Join(  list.ToArray())); Console.WriteLine(]); Console.ReadKey(); } }

Vulpes · Answer

.... but you need to know which numbers from 0 to n have a two in them to start with :)

Jignesh Trivedi · Answer

hi you can also use split function string testData = 2 12 20 21 22 23 24 25 26 2728 29 32; string[] mydatas = testData.Split(new char[] { '2' }); int count = mydatas.Count() - 1; hope this will help you.

Shridhar Sharma · Answer

thanks..!!!