C# – Operators – Part 5

We will learn about the various operators available in C#.

Arithmetic Operators

These help to carry out basic arithmetic operations on numbers.

Arithmetic Operators	Name
+	Addition
–	Subtraction
*	Multiplication
/	Division
%	Modulus
++	Increment
– –	Decrement

Let’s see these in action.

//Arithmetic operators
Console.WriteLine("Arithmetic Operators");
Console.WriteLine(10 + 10);
Console.WriteLine(100 - 10);
Console.WriteLine(10 * 10);
Console.WriteLine(20 / 10);
Console.WriteLine(12 % 10);

//Increment & Decrement operators only work with variables, properties, indexers
int myAge = 30;
myAge++;
Console.WriteLine(myAge);
int yourAge = 20;
yourAge--;
Console.WriteLine(yourAge);

Output:

Arithmetic Operators
20
90
100
2
2
31
19

Comparison Operators

As the name suggests, comparison operators are used to compare 2 values, returns a Boolean.

Comparison Operator	Name
==	Equal to
!=	Not Equal to
>	Greater than
<	Lesser than
>=	Greater than or equal to
<=	Lesser than or equal to

Let’s see them in action.

//Comparison operators
Console.WriteLine("Comparison Operators");
Console.WriteLine(5 == 5);
Console.WriteLine(5 != 10);
Console.WriteLine(5 < 10);
Console.WriteLine(5 > 10);
Console.WriteLine(5 >= 10);
Console.WriteLine(5 <= 10);

Output:

Comparison Operators
True
True
True
False
False
True

Logical Operators

These operators are used with variables, expressions to determine the logic amongst them.

Let’s see them in action.

Operator	Description	Example
&&	AND	num1 < 10 && num1 > 5
||	OR	num1 == 10 || num1 == 5
!	NOT	!(num1 > 10)

//Logical Operations
Console.WriteLine("Logical Operators");
int num1 = 100;
Console.WriteLine(num1 > 50 && num1 < 500);
Console.WriteLine(num1 == 100 || num1 == 50);
Console.WriteLine(!true);

Output:

Logical Operators
True
False
False

AND – Returns true only when both the expressions are true, returns false when any of the expressions are false

OR – Returns true when any one of the expressions are true

Logical operators when mixed with the assignment operator bring in more flavor in decision making, as demonstrated below.

num >=5 && num <=10;
num !=10 || num >=100; 

We will be dealing with operators more and more in the upcoming articles.