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  1. using System;
  2. using System.Text; 
  3. public class Test
  4. {
  5.         public static void Main()
  6.         {
  7. StringBuilder stringBuilder = new StringBuilder();
  8. string str = "+123-456/7890";
  9. foreach(char c in str.ToCharArray() )
  10.   if ( char.IsDigit(c) ) stringBuilder.Append(c);
  11.  
  12. str = stringBuilder.ToString();
  13.  
  14.  
  15.         }
  16. }
Success #stdin #stdout 0.03s 37792KB
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https://ideone.com/tH4O4
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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