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  1. using static System.Console;
  2.  
  3. public class Program {
  4. 	public static void Main() {
  5. 		Write("Digite um numero de 4 digitos: ");
  6. 		var numero = ReadLine();
  7. 		var soma = 0;
  8. 		foreach (var chr in numero) {
  9. 			if (!char.IsDigit(chr)) {
  10. 				WriteLine("não é um número válido");
  11. 				return;
  12. 			}
  13. 			soma += chr - '0';
  14. 		}
  15. 		WriteLine($"Soma dos numeros = {soma}");
  16. 	}
  17. }
  18.  
  19. //https://pt.stackoverflow.com/q/349771/101
Success #stdin #stdout 0.02s 15968KB
comments (?)
stdin 
1234
stdout 
Digite um numero de 4 digitos: Soma dos numeros = 10
https://ideone.com/QpXrkE
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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