C#: Arithmetic Operators: ++, --

++ Increment operator; increments a value by 1

-- Decrement operator; decrements a value by 1

Pre increment

    Syntax:

    ++variable

      pre increment operator increments the variable value by 1 immediately.

        

Program.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        int var = 10;

        Console.WriteLine("var = {0}", ++var);
    }
}

Output

var = 11

Post increment

    Syntax:

        variable++

    Post increment operator increments the variable value by 1 after executing the current statement.

Program.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        int var = 10;

        Console.WriteLine("var = {0}", var++);
        Console.WriteLine("var = {0}", var);
    }
}

Output

var = 10

var = 11

Pre Decrement

    Syntax:

        --variable

    Pre decrement operator decrements the variable value by 1 immediately.

Program.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        int var = 10;

        Console.WriteLine("var = {0}", --var);
    }
}

Output

var = 9

Post Decrement

    Syntax:

        variable--

Post decrement operator decrements the variable value by 1 after executing the current statement.

Program.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        int var = 10;

        Console.WriteLine("var = {0}", var--);
        Console.WriteLine("var = {0}", var);
    }
}

Output

var = 10

var = 9

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