Question

How to extract only numbers from a string in C#

Answer 1

using System;
using System.Text.RegularExpressions;
  
class Program
{
    static String extract_numbers(String s) {
        int len = s.Length;
  
        var regx = new Regex("[0-9]");
  
        String chars = "";
        for (int i = 0; i < len; i++) { 
            char ch = s[i]; 
            if (regx.IsMatch(ch.ToString())) 
                chars = chars + ch; 
        } 
        return chars;
    } 
    static void Main() {
        String s = "c++14$vb.NET&%java*() php c# <>/python 3.7.3"; 
          
        Console.WriteLine(extract_numbers(s));
    }
}
  
  
/*
run:
  
14373
  
*/

 

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