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Check if a string is numeric or not using Regex in C#

3 years ago

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In this example you will check if string contains only numbers using Regex in C#

Code:

    class Program
    {
        static void Main(string[] args)
        {
            string text = "144.52";
            bool numeric = true;
            var regex = new Regex(@"^-?[0-9][0-9,\.]+$");

            numeric = regex.IsMatch(text);

            if (numeric)
                Console.WriteLine("{0} is a number",text);
            else
                Console.WriteLine("{0} is not a number", text);

            Console.ReadLine();
        }
    }

class Program

{

static void Main(string[] args)

{

string text = "144.52";

bool numeric = true;

var regex = new Regex(@"^-?[0-9][0-9,\.]+$");

numeric = regex.IsMatch(text);

if (numeric)

Console.WriteLine("{0} is a number",text);

else

Console.WriteLine("{0} is not a number", text);

Console.ReadLine();

}

Output:

Check if a string is numeric or not using Regex in C#

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