Question

How to remove the letters (all non-numeric) from a string in C#

Answer 1

using System;
using System.Linq;

class Program
{
    public static string RemoveAllLetters(string s) {
        return new string(s.Where(ch => char.IsDigit(ch)).ToArray());
    }

    static void Main() {
        string str = "1java23c#908c++674c";
        
        str = RemoveAllLetters(str);

        Console.Write(str);
    }
}




/*
run:

123908674

*/

 

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Answer 2

using System;
using System.Text.RegularExpressions;
 
class Program
{
    static void Main() {
        string str = "1java23c#908c++674c";
         
        str = Regex.Replace(str, "[^0-9.]", "");
 
        Console.Write(str);
    }
}
 
 
 
 
/*
run:
 
123908674
 
*/

 

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