C#: Compare two substrings

Last update on August 25 2025 12:51:27 (UTC/GMT +8 hours)

Write a C# Sharp program to compare (less than, greater than, equal to) two substrings.

Sample Solution:-

C# Sharp Code:

using System;

// Define the Example21 class
class Example21
{
    // Main method - entry point of the program
    public static void Main()
    {
        // Define and initialize string variables
        String str1 = "computer"; // String 1
        String str2 = "system";   // String 2
        String str;               // String to store comparison result
        int result;               // Result of the comparison

        // Display initial strings
        Console.WriteLine();
        Console.WriteLine("str1 = '{0}', str2 = '{1}'", str1, str2);

        // Perform comparison between substrings of str1 and str2
        // Compare a substring of str1 starting at index 2 with a substring of str2 starting at index 0, each with a length of 2
        result = String.Compare(str1, 2, str2, 0, 2);

        // Determine the relationship between the compared substrings
        str = ((result < 0) ? "less than" : ((result > 0) ? "greater than" : "equal to"));

        // Display the comparison result
        Console.Write("Substring '{0}' in '{1}' is ", str1.Substring(2, 2), str1);
        Console.Write("{0} ", str);
        Console.WriteLine("substring '{0}' in '{1}'.", str2.Substring(0, 2), str2);
    }
}

Sample Output:

str1 = 'computer', str2 = 'system'                                                                            
Substring 'mp' in 'computer' is less than substring 'sy' in 'system'.

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