C#: Convert ASCII text to hexadecimal value as a string

Last update on August 25 2025 12:50:14 (UTC/GMT +8 hours)

Write a C# Sharp program that converts ASCII characters to hexadecimal values.

Sample Data:
("Python") -> "50 79 74 68 6f 6e"
("Century of the year") -> 43 65 6e 74 75 72 79 20 6f 66 20 74 68 65 20 79 65 61 72
("CPP Exercises") -> 43 50 50 20 45 78 65 72 63 69 73 65 73

Sample Solution:

C# Sharp Code:

using System;
using System.Linq;

namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            // Declare and initialize a string variable 'text'
            string text = "Python";

            // Display the original string
            Console.WriteLine("Original strings: " + text);

            // Display the conversion of ASCII text to hexadecimal value as a string
            Console.WriteLine("Convert said ASCII text to hexadecimal value as a string:" + test(text));

            // Change the value of 'text'
            text = "Century of the year";

            // Display the new original string
            Console.WriteLine("\nOriginal strings: " + text);

            // Display the conversion of ASCII text to hexadecimal value as a string
            Console.WriteLine("Convert said ASCII text to hexadecimal value as a string:" + test(text));

            // Change the value of 'text'
            text = "CPP Exercises";

            // Display the new original string
            Console.WriteLine("\nOriginal strings: " + text);

            // Display the conversion of ASCII text to hexadecimal value as a string
            Console.WriteLine("Convert said ASCII text to hexadecimal value as a string:" + test(text));
        }

        // Define a method 'test' that takes a string argument 'text' and returns a string
        public static string test(string text)
        {
            // Convert each character in the string to its ASCII code, then to its hexadecimal representation
            // Aggregate the hexadecimal representations of each character into a single string
            // Separate each hexadecimal value with a space, convert to lowercase, and trim any leading/trailing spaces
            return text.ToCharArray().Aggregate("", (a, b) => a + ((byte)b).ToString("X") + " ").ToLower().Trim();
        }
    }
}

Sample Output:

Original strings: Python
Convert said ASCII text to hexadecimal value as a string:50 79 74 68 6f 6e

Original strings: Century of the year
Convert said ASCII text to hexadecimal value as a string:43 65 6e 74 75 72 79 20 6f 66 20 74 68 65 20 79 65 61 72

Original strings: CPP Exercises
Convert said ASCII text to hexadecimal value as a string:43 50 50 20 45 78 65 72 63 69 73 65 73

Flowchart :

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C# Sharp Code Editor:

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