Int16.CompareTo() Method in C#

The Int16.CompareTo() method in C# is used to compare a 16-bit signed integer (short) with another value and returns an integer that indicates their relative order. This method is essential for sorting operations and determining the relationship between two Int16 values.

Syntax

The Int16.CompareTo() method has two overloads −

public int CompareTo(short value);
public int CompareTo(object value);

Parameters

• value − A 16-bit signed integer or an object to compare with the current instance.

Return Value

The method returns an integer with the following meaning −

Using CompareTo with Int16 Values

Example - Different Values

using System;

public class Demo {
   public static void Main() {
      short val1 = 20;
      short val2 = 18;
      Console.WriteLine("Value 1 = " + val1);
      Console.WriteLine("Value 2 = " + val2);
      Console.WriteLine("Return value (comparison) = " + val1.CompareTo(val2));
   }
}

The output of the above code is −

Value 1 = 20
Value 2 = 18
Return value (comparison) = 1

Example - Equal Values

using System;

public class Demo {
   public static void Main() {
      short val1 = 10;
      short val2 = 10;
      Console.WriteLine("Value 1 = " + val1);
      Console.WriteLine("Value 2 = " + val2);
      Console.WriteLine("Return value (comparison) = " + val1.CompareTo(val2));
   }
}

The output of the above code is −

Value 1 = 10
Value 2 = 10
Return value (comparison) = 0

Using CompareTo with Object Parameter

Example

using System;

public class Demo {
   public static void Main() {
      short val1 = 15;
      object val2 = (short)25;
      Console.WriteLine("Value 1 = " + val1);
      Console.WriteLine("Value 2 = " + val2);
      Console.WriteLine("Return value (comparison) = " + val1.CompareTo(val2));
      
      // Comparing with null
      Console.WriteLine("Comparing with null = " + val1.CompareTo(null));
   }
}

The output of the above code is −

Value 1 = 15
Value 2 = 25
Return value (comparison) = -1
Comparing with null = 1

Common Use Cases

The CompareTo() method is commonly used in sorting algorithms, finding minimum or maximum values, and implementing custom comparison logic in data structures.

Example - Sorting Array

using System;

public class Demo {
   public static void Main() {
      short[] numbers = {30, 10, 25, 5, 15};
      Console.WriteLine("Original array:");
      foreach(short num in numbers) {
         Console.Write(num + " ");
      }
      
      Array.Sort(numbers);
      Console.WriteLine("\nSorted array:");
      foreach(short num in numbers) {
         Console.Write(num + " ");
      }
   }
}

The output of the above code is −

Original array:
30 10 25 5 15 
Sorted array:
5 10 15 25 30

Conclusion

The Int16.CompareTo() method provides a standardized way to compare 16-bit signed integers, returning negative, zero, or positive values to indicate their relative order. This method is fundamental for sorting operations and implementing comparison-based algorithms with Int16 values.