operators in C#

 

Operators:

v Operators are used to perform operations on variables and values.

 

v An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.

 

v Operators are the foundation of any programming language. Thus the functionality of C# language is incomplete without the use of operators.

 

C# has rich set of built-in operators and provides the following type of operators:

 

1. Arithmetic Operators.

2. Relational Operators.

3. Logical Operators.

4. Assignment Operators.

5. Conditional or Ternary Operator.

 

 

 

 

1.   Arithmetic Operators:

 

 These are used to perform arithmetic/mathematical operations on operands.

 

Following table shows all the arithmetic operators supported by C#. Assume variable A holds 20 and variable B holds 10, then –

 

Operator	Description	Example
+	Adds two operands	A + B = 30
-	Subtracts second operand from the first	A - B = 10
*	Multiplies both operands	A * B = 200
/	Divides numerator by de-numerator	A / B = 2
%	Modulus Operator and remainder of after an integer division	A % B = 0
++	Increment operator increases integer value by one	A++ (A+1) = 11
--	Decrement operator decreases integer value by one	A--  (A-1) = 9

 

 

2.  Relational Operators:

Relational operators are used for comparison of two values.

The return value of a comparison is either true or false.

 

Operator	Description	Example
==	Checks if the values of two operands are equal or not, if yes then condition becomes true.	(A == B) is not true.
!=	Checks if the values of two operands are equal or not, if values are not equal then condition becomes true.	(A != B) is true.
>	Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.	(A > B) is not true.
<	Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.	(A < B) is true.
>=	Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.	(A >= B) is not true.
<=	Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.	(A <= B) is true.

 

 

 

 

3.  Logical Operators:

They are used to combine two or more conditions or to complement the evaluation of the original condition in consideration.

 

Following table shows all the logical operators supported by C#. Assume variable A holds Boolean value true and variable B holds Boolean value false, then

Operator	Description	Example
&&	Called Logical AND operator. Returns True if both statements are true.	(A && B) is false.
||	Called Logical OR Operator. Returns True if one of the statements is true.	(A || B) is true.
!	Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true then Logical NOT operator will make false.	!(A && B) is true.

 

 

 

4.  Assignment operators:

v Assignment operators are used to assigning a value to a variable.

 

v The left side operand of the assignment operator is a variable and right side operand of the assignment operator is a value.

 

v The value on the right side must be of the same data-type of the variable on the left side otherwise the compiler will raise an error.

There are following assignment operators supported by C# −

Operator	Description	Example
=	Simple assignment operator, Assigns values from right side operands to left side operand	C = A + B assigns value of A + B into C
+=	Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand	C += A is equivalent to C = C + A
-=	Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand	C -= A is equivalent to C = C - A
*=	Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand	C *= A is equivalent to C = C * A
/=	Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand	C /= A is equivalent to C = C / A
%=	Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand	C %= A is equivalent to C = C % A

 

 

5.  Conditional or Ternary Operator:

 

C# includes a decision-making operator ?: which is called the conditional operator or ternary operator. It is the short form of the if else conditions.

Syntax:

condition ? statement 1 : statement 2

The ternary operator starts with a boolean condition.

If this condition evaluates to true then it will execute the statement1 after?, otherwise the statement2 after : will be executed.