Common Operators in C#

Common Operators in C#

• Operators are used to create a link, relation or operation between two entities/variables. Few of these C# operators are as follows:
  • Assignment Operator ( = )
  • Arithmetic Operators ( + , - , * , / , % )
  • Comparison Operators ( == , != , > , < , >= , <= )
  • Conditional Operators ( && , | | )
  • Ternary Operator ( ? : )
  • Null Coalescing Operator ( ?? )
  • Escape Sequence ( / )
  • Verbatim Literal ( @ )
• Let's discuss them one by one in detail:

1. Assignment Operator ( = )

• Assignment Operator is used to assign a value from one entity to another.
• Let's say we initialize an integer with value 5, so what we need to write is int i = 5; so this assignment operator has assigned a value of 5 to integer i.

2. Arithmetic Operators ( + , - , * , / , % )

• Arithmetic Operators ( + , - , * , / , % ) are used for performing different mathematical operations between two entities/variables.
• Each arithmetic operator has its own mathematical operation associated with it. For example:

• 

  ( + ) is used to add two numbers i.e. int a = 5 + 10; so compiler will first apply the arithmetic operator (+) and will add 5 & 10 and after that will use assignment operator to assign the value 15 to variable a.

• ( - ) is used to subtract two numbers i.e. int b = 10 - 5; result will be 5.
• ( * ) is use to multiply two numbers i.e. int c = 10 * 5; result will be 50.
• ( / ) is used to divide two numbers i.e. int d = 10 / 2; result will be 5.
• ( % ) is used to get the remainder of two numbers i.e. int e = 22 % 4; result will be 2.

3. Comparison Operators ( == , != , > , < , >= , <= )

• Comparison Operators ( == , != , > , < , >= , <= ) are used to compare two entities with one another.

• 

  We will discuss them in detail in Loops section while discussing if loop.
  • a == b, it will check whether a is equal to b.
  • a != b, a is not equal to b.
  • a > b, a is greater than b.
  • a < b, a is less than b.
  • a >= b, a is greater than or equal to b.
  • a <= b, a is less than or equal to b.
  • I am using few Comparison operators in this right figure.

4. Conditional Operators ( && , | | )

• 

  Conditional Operators ( && , | | ) are used to create a relation between two conditions.
• This one will also be discussed in more detail in IF Loops section.
  • && , It is pronounced as AND, this operator makes sure that both conditions must be true.
  • | | , It is pronounced as OR, this operator returns TRUE if either of the two conditions is true.
• I have placed a conditional operator in right figure, I have placed a check that value must be greater than 10 and less than 20.

5. Ternary Operator ( ? : )

• Ternary operator is one of the coolest feature of C# and comes quite handy at times.
• It's a simple form of if loop, which reduces the IF Else Loop code in single line. We will discuss it in C# IF Loop lecture.

6. Null Coalescing Operator ( ?? )

• Null Coalescing Operator ( ?? ) is used to convert nullable value into non-nullable value.
• Let's say we have two integers a and b defined as:

int? a = 15; (nullable variable)

int b = 0; (non-nullable variable)

• Now we want to save value of a into b so if you write a = b; compiler will generate an error.
• So, in order to do that you need to use Null Coalescing Operator ( ?? ) as follow:

int b = a ?? 0;

• if the value of a is null, then b will become 0. It's called the default value, you can set it to anything, I've made it 0.

Complete Code

• Here's the complete code used in this tutorial:

using System; namespace TEPProject { class Program { static void Main(string[] args) { Console.Write("Enter Numer 1: "); int Num1 = int.Parse(Console.ReadLine()); Console.Write("Enter Numer 2: "); int Num2 = int.Parse(Console.ReadLine()); int Total = Num1 + Num2; if (Total > 10 && Total < 25) { Console.WriteLine("Total count is {0}", Total); } else { Console.WriteLine("Total count is less than 10 or greater than 25"); } } } }