C# Sharp Exercises: Check if a string is numeric or not

Last update on December 20 2024 12:46:52 (UTC/GMT +8 hours)

Check Numeric String

Write a C# Sharp program to check if a given string (floating point and negative numbers included) is numeric or not. Return True if the string is numeric, otherwise false.

Sample Data:
("123") -> True
("123.33") -> True
("33/33") -> False
("234234d2") -> False

Sample Solution:

C# Sharp Code:

using System;

namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            // Initializing different strings
            string text = "123";
            Console.WriteLine("Original string: " + text);
            Console.WriteLine("Check if the said string is numeric or not! " + test(text));

            text = "123.33";
            Console.WriteLine("Original string: " + text);
            Console.WriteLine("Check if the said string is numeric or not! " + test(text));

            text = "33/33";
            Console.WriteLine("Original string: " + text);
            Console.WriteLine("Check if the said string is numeric or not! " + test(text));

            text = "234234d2";
            Console.WriteLine("Original string: " + text);
            Console.WriteLine("Check if the said string is numeric or not! " + test(text));
        }

        // Method to check if a string is numeric
        public static bool test(string text)
        {
            double Result; // Declare a variable to store the parsed result

            // Try parsing the input string as a double
            // If successful, the string is numeric, return true; otherwise, return false
            return double.TryParse(text, out Result);
        }
    }
}

Sample Output:

Original string: 123
Check if the said string is numeric or not! True
Original string: 123.33
Check if the said string is numeric or not! True
Original string: 33/33
Check if the said string is numeric or not! False
Original string: 234234d2
Check if the said string is numeric or not! False

Flowchart:

C# Sharp Code Editor:

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