C# - Operators

An operator performs some operation on single or multiple operands (data value) and produces a result. Operators are symbols or keywords that instruct the C# engine to take certain actions. The addition (+) sign, for example, instructs the C# engine to add two variables or values, whereas the equal-to (=), greater-than (>), or less-than (<) symbols instruct the compiler to compare two variables or values, and so on.

Let us take a simple expression 3 + 5 is equal to 8. Here, 3 and 5 are called operands and "+" is called the operator.

C# contains both unary (single operand) and binary operators (two operands).

Unary operator - Operand operator or Operator operand

Example

a++ or ++a

Binary operator -Operand operator operand

Example

a * b

The following operators are available in C#.

1. Arithmetic Operators
2. Assignment Operators
3. Comparison (Relational) Operators
4. Bitwise Operators
5. Logical Operators

1. Arithmetic Operators in C#

Arithmetic Operators are used to perform arithmetic on numbers or operands.

The following table show the list of arithmatic operators in C#.

You can paste the below code in VisualStudio editor and run the program.

using System;

namespace FirstProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Addition:");
            Console.WriteLine("20 + 30 = " + (20 + 30) );
            Console.WriteLine("Subtraction:");
            Console.WriteLine("12 - 3 =" + (30 - 20) );
            Console.WriteLine("Multiplication:");
            Console.WriteLine("12 * 3 =" + (30 * 20) );
            Console.WriteLine("Division:");
            Console.WriteLine("12 / 3 =" + (30 / 3) );
            Console.WriteLine("Remainder:");
            Console.WriteLine("12 % 3 =" + (30 % 4) );
            var arthvar = 7;
            Console.WriteLine("Value of arthvar is " +arthvar);
            Console.WriteLine("Increment:");
            Console.WriteLine("arthvar++ is " + (arthvar++) );
            Console.WriteLine("Value of arthvar is " + arthvar );
            Console.WriteLine("++arthvar is " + (++arthvar) );
            Console.WriteLine("Value of arthvar is " + arthvar );
            Console.WriteLine("Decrement:");
            Console.WriteLine("arthvar-- is " + (arthvar--));
            Console.WriteLine("Value of arthvar is " + arthvar );
            Console.WriteLine("--arthvar is " + (--arthvar));
            Console.WriteLine("Value of arthvar is " + arthvar );                                 
        }
    }
}

Output

2. Assignment Operators in C#

An assignment operator is used to assigns a value to the left operand based on the value of its right operand with the help of equals = sign.

The following table show the list of Assignment operators in C#.

You can paste the below code in VisualStudio editor and run the program.

using System;
namespace FirstProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            
            var a=0;
            a = 10;
            Console.WriteLine("= Operator =" + a );

            a = 20;
            a += 30;
            Console.WriteLine("+= Operator=" + a );

            a = 50;
            a -= 20;
            Console.WriteLine("-= Operator=" + a );

            a = 5;
            a *= 25;
            Console.WriteLine("*= Operator=" + a );

            a = 50;
            a /= 10;
            Console.WriteLine("/= Operator=" + a );

            a = 100;
            a %= 15;
            Console.WriteLine("%= Operator=" + a);          
        }
    }
}

Output

3. Comparison Operators

A comparison operator compares its operands and returns a boolean value (true or false) based on whether the comparison is true.

The following table show the list of Comparison operators in C#.

You can paste the below code in VisualStudio editor and run the program.

using System;

namespace FirstProgram
{
    class Program
    {
        static void Main(string[] args)
        {                     
            int x = 35;
            int y = 45;
            int z = 35;

             Console.WriteLine("== Operator : ");
             Console.WriteLine(x == z);         
           
             Console.WriteLine(" != Operator : ");
             Console.WriteLine(x != y);
                     
             Console.WriteLine(" < Operator : ");
             Console.WriteLine(x < y);
            
             Console.WriteLine(" > Operator : ");
             Console.WriteLine(x > y);
            
             Console.WriteLine(" <= Operator : ");
             Console.WriteLine(x <= y);
           
             Console.WriteLine(" >= Operator : ");
             Console.WriteLine(x >= y);
        }
    }
}

Output

4. Bitwise Operators

The bitwise operators perform bitwise operations on operands. The bitwise operators are as follows:

You can paste the below code in VisualStudio editor and run the program.

using System;

namespace FirstProgram
{
    class Program
    {
        static void Main(string[] args)
        {                                
             Console.WriteLine(10 == 20 & 20 == 33);           
             Console.WriteLine(10 == 20 | 20 == 33);           
             Console.WriteLine(10 == 20 ^ 20 == 33);            
             Console.WriteLine(~10);            
             Console.WriteLine(10 << 2);           
             Console.WriteLine(10 >> 2);                                  
        }
    }
}

Output

5. Logical Operators

These operators are (typically) used with Boolean/ logical values and return a Boolean value. However, if the && and || operators are used with non-Boolean values, they may return a non-Boolean value.

The following table show the list of Logical operators in C#.

You can paste the below code in VisualStudio editor and run the program.

using System;

namespace FirstProgram
{
    class Program
    {
        static void Main(string[] args)
        {
            var x = 8;
            var y = 3;
            Console.WriteLine("Logical AND:");
            Console.WriteLine(x < 10 && y > 1);
            Console.WriteLine(x < 10 && y < 1);
            Console.WriteLine("Logical OR:");
            Console.WriteLine(x < 10 || y > 1);
            Console.WriteLine(x < 10 || y > 1);
            Console.WriteLine(x < 10 || y < 1);
            Console.WriteLine("Logical NOT:");           
            Console.WriteLine(!(x > y));

        }
    }
}

Output

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