C# OPERATORS

An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations. C# has rich set of built-in operators and provides the following type of operators:

• Arithmetic Operators
• Relational Operators
• Logical Operators
• Bitwise Operators
• Assignment Operators
• Misc Operators

Arithmetic Operators

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 21;
            int b = 10;
            int c;
            c = a + b;
            Console.WriteLine("Line 1 - Value of c is {0}", c);
            c = a - b;
            Console.WriteLine("Line 2 - Value of c is {0}", c);
            c = a * b;
            Console.WriteLine("Line 3 - Value of c is {0}", c);
            c = a / b;
            Console.WriteLine("Line 4 - Value of c is {0}", c);
            c = a % b;
            Console.WriteLine("Line 5 - Value of c is {0}", c);
            c = a++;
            Console.WriteLine("Line 6 - Value of c is {0}", c);
            c = a--;
            Console.WriteLine("Line 7 - Value of c is {0}", c);
            Console.ReadLine();
            //Line 1 - Value of c is 31
            //Line 2 - Value of c is 11
            //Line 3 - Value of c is 210
            //Line 4 - Value of c is 2
            //Line 5 - Value of c is 1
            //Line 6 - Value of c is 21
            //Line 7 - Value of c is 22
        }
    }
}

Relational Operators

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 21;
            int b = 10;

            if (a == b)
            {
                Console.WriteLine("Line 1 - a is equal to b");
            }
            else
            {
                Console.WriteLine("Line 1 - a is not equal to b");
            }
            if (a < b)
            {
                Console.WriteLine("Line 2 - a is less than b");
            }
            else
            {
                Console.WriteLine("Line 2 - a is not less than b");
            }
            if (a > b)
            {
                Console.WriteLine("Line 3 - a is greater than b");
            }
            else
            {
                Console.WriteLine("Line 3 - a is not greater than b");
            }
            /* Lets change value of a and b */
            a = 5;
            b = 20;
            if (a <= b)
            {
                Console.WriteLine("Line 4 - a is either less than or equal to b");
            }
            if (b >= a)
            {
                Console.WriteLine("Line 5-b is either greater than or equal to b");
            }
            //Line 1 - a is not equal to b
            //Line 2 - a is not less than b
            //Line 3 - a is greater than b
            //Line 4 - a is either less than or equal to b
            //Line 5 - b is either greater than or equal to b
        }
    }
}

Logical Operators

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            bool a = true;
            bool b = true;
            if (a && b)
            {
                Console.WriteLine("Line 1 - Condition is true");
            }
            if (a || b)
            {
                Console.WriteLine("Line 2 - Condition is true");
            }
            /* lets change the value of a and b */
            a = false;
            b = true;
            if (a && b)
            {
                Console.WriteLine("Line 3 - Condition is true");
            }
            else
            {
                Console.WriteLine("Line 3 - Condition is not true");
            }
            if (!(a && b))
            {
                Console.WriteLine("Line 4 - Condition is true");
            }
            Console.ReadLine();
            //Line 1 - Condition is true
            //Line 2 - Condition is true
            //Line 3 - Condition is not true
            //Line 4 - Condition is true
        }
    }
}

Bitwise Operators

Bitwise operator works on bits and perform bit by bit operation. The truth tables for &, |, and ^ are as follows

Assume if A = 60; and B = 13, then in the binary format they are as follows:

A = 0011 1100
B = 0000 1101

---

A&B = 0000 1100
A|B = 0011 1101
A^B = 0011 0001
~A = 1100 0011

The Bitwise operators supported by C# are listed in the following table. Assume variable A holds 60 and variable B holds 13, then

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 60; /* 60 = 0011 1100 */
            int b = 13; /* 13 = 0000 1101 */
            int c = 0;
            c = a & b; /* 12 = 0000 1100 */
            Console.WriteLine("Line 1 - Value of c is {0}", c);
            c = a | b; /* 61 = 0011 1101 */
            Console.WriteLine("Line 2 - Value of c is {0}", c);
            c = a ^ b; /* 49 = 0011 0001 */
            Console.WriteLine("Line 3 - Value of c is {0}", c);
            c = ~a; /*-61 = 1100 0011 */
            Console.WriteLine("Line 4 - Value of c is {0}", c);
            c = a << 2; /* 240 = 1111 0000 */
            Console.WriteLine("Line 5 - Value of c is {0}", c);
            c = a >> 2; /* 15 = 0000 1111 */
            Console.WriteLine("Line 6 - Value of c is {0}", c);
            Console.ReadLine();
            //Line 1 - Value of c is 12
            //Line 2 - Value of c is 61
            //Line 3 - Value of c is 49
            //Line 4 - Value of c is -61
            //Line 5 - Value of c is 240
            //Line 6 - Value of c is 15
        }
    }
}