Question

How to extract the last number from string in C#

Answer 1

using System;
using System.Text.RegularExpressions;

public class Program {
    public static void Main() {
        String s = "12abc 9836 xy%^(s 33 * 9 ppp 100";

        string[] numbers = Regex.Split(s, @"\D+");
        
        int n = 0;
        foreach (string item in numbers) {
            if (!string.IsNullOrEmpty(item)) {
                n = int.Parse(item);
            }
        }
        Console.WriteLine("{0}", n);
    }
}



/*
run:

100

*/

 

70+ SQL courses for beginners and professionals

Answer 2

using System;
using System.Text.RegularExpressions;

public class Program {
    public static void Main() {
        String s = "12abc 9836 xy%^(s 33 * 9 100 200ppp";

        string[] numbers = Regex.Split(s, @"\D+");
        
        int n = int.Parse(numbers[numbers.Length - 2]);

        Console.WriteLine("{0}", n);
    }
}



/*
run:

200

*/

 

70+ SQL courses for beginners and professionals