fork download
copy 
  1. using System;
  2. using System.Collections.Generic;
  3. using System.IO;
  4. using System.Linq;
  5. using System.Text.RegularExpressions;
  6.  
  7. public class Test
  8. {
  9. 	public static void Main()
  10. 	{
  11. 		var s = "09123456789";
  12.     	if (s.Length == 11 && s.StartsWith("09") && s.All(Char.IsDigit))
  13.         	Console.WriteLine("Valid!");
  14. 	}
  15. }
Success #stdin #stdout 0s 29800KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Valid!
https://ideone.com/IDXN0E
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!