Function to check if a text is number

Create a C# program that implements a function called IsNumber that receives a text parameter from the user and check if the text is a number or not.

Input

234

Output

True

Solution

using System;
public class CheckIsNumber
{
    public static void Main(string[] args)
    {
        string text = Console.ReadLine();
        Console.WriteLine(text);
    }

    public static bool IsNumber(string text)
    {
        for (int i = 0; i < text.Length; i++)
        {
            if ((text[i] < '0') || (text[i] > '9'))
            {
                return false;
            }
        }

        return true;
    }
}