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Int64.CompareTo Method in C# with Examples
  • Last Updated : 04 Apr, 2019

Int64.CompareTo Method is used to compare the current instance to a specified object or Int64 and returns a sign of their relative values. There are 2 methods in the overload list of this method as follows:

  • CompareTo(Int64) Method
  • CompareTo(Object) Method

Int64.CompareTo(Int64) Method

This method is used to compare the current instance to a specified 64-bit signed integer and returns a sign of their relative values.

Syntax:

public int CompareTo (long value);

Here, it takes integer to compare.



Return Value: It returns a 32-bit signed number indicating the relative values of current instance and value parameter as follows:

  • Less than Zero: if Current Instance < value
  • Zero: if Current Instance = value
  • Greater than Zero: if Current Instance > value

Below programs illustrate the use of the above-discussed method:

Example 1:

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// C# program to demonstrate the
// Int64.CompareTo(Int64) Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        // Declaring and initializing value1
        long value1 = 10;
  
        // Declaring and initializing value2
        long value2 = 20;
  
        // compare both Int64 value
        // using CompareTo() method
        int status = value1.CompareTo(value2);
  
        // checking the status
        if (status > 0)
            Console.WriteLine("{0} is greater than {1}",
                                        value1, value2);
        else if (status < 0)
            Console.WriteLine("{0} is less than {1}",
                                     value1, value2);
        else
            Console.WriteLine("{0} is equal to {1}",
                                    value1, value2);
    }
}

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Output:

10 is less than 20

Example 2:

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// C# program to demonstrate the
// Int64.CompareTo(Int64) Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        // calling get() method
        get(5, 7);
        get(3025, 3025);
        get(10, 20);
        get(7, -12);
    }
  
    // defining get() method
    public static void get(long value1,
                           long value2)
    {
  
        // using CompareTo() method
        int status = value1.CompareTo(value2);
  
        // checking the status
        if (status > 0)
            Console.WriteLine("{0} is greater than {1}",
                                        value1, value2);
        else if (status < 0)
            Console.WriteLine("{0} is less than {1}",
                                     value1, value2);
        else
            Console.WriteLine("{0} is equal to {1}",
                                    value1, value2);
    }
}

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Output:

5 is less than 7
3025 is equal to 3025
10 is less than 20
7 is greater than -12

Int64.CompareTo(Object) Method

This method is used to compare the current instance to a specified object and returns a sign of their relative values.

Syntax:



public int CompareTo (object value);

Here, it takes an object to compare, or null.

Return Value: It returns a 32-bit signed number indicating the relative values of current instance and value parameter as follows:

  • Less than Zero: If Current Instance < value
  • Zero: If Current Instance = value
  • Greater than Zero: If Current Instance > value or value is null.

Exception: It throws ArgumentException if value is not an Int64.

Below programs illustrate the use of the above-discussed method:

Example 1:

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// C# program to demonstrate the
// Int64.CompareTo(object) Method
using System;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        try {
  
            // Declaring and initializing value1
            long value1 = 10;
  
            // Declaring and initializing value2
            object value2 = (long)5689412587;
  
            // using CompareTo() method
            int status = value1.CompareTo(value2);
  
            // checking the status
            if (status > 0)
                Console.WriteLine("{0} is greater than {1}",
                                            value1, value2);
  
            else if (status < 0)
                Console.WriteLine("{0} is less than {1}",
                                         value1, value2);
            else
                Console.WriteLine("{0} is equal to {1}",
                                        value1, value2);
        }
  
        catch (ArgumentException e) 
        {
            Console.WriteLine("value2 must be Int64");
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

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Output:

10 is less than 5689412587

Example 2: For ArgumentException

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// C# program to demonstrate the
// Int64.CompareTo(object) Method
using System;
using System.Globalization;
  
class GFG {
  
    // Main Method
    public static void Main()
    {
        try {
  
            // Declaring and initializing value1
            long value1 = 10;
  
            // Declaring and initializing value2
            object value2 = 1/3;
  
            // using CompareTo() method
            int status = value1.CompareTo(value2);
  
            // checking the status
            if (status > 0)
                Console.WriteLine("{0} is greater than {1}",
                                            value1, value2);
  
            else if (status < 0)
                Console.WriteLine("{0} is less than {1}",
                                         value1, value2);
            else
                Console.WriteLine("{0} is equal to {1}",
                                        value1, value2);
        }
  
        catch (ArgumentException e) 
        {
            Console.WriteLine("value2 must be Int64");
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

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Output:

value2 must be Int64
Exception Thrown: System.ArgumentException

Reference:

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