# 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 −

المشغل هو رمز يخبر المترجم أن يقوم بمعالجات رياضية أو منطقية محددة. يحتوي C # على مجموعة غنية من المشغلات المضمنة ويوفر النوع التالي من المشغلين -

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

This tutorial explains the arithmetic, relational, logical, bitwise, assignment, and other operators one by one.

## Arithmetic Operators

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

يوضح الجدول التالي جميع المعاملات الحسابية التي يدعمها C #. افترض أن المتغير A يحمل 10 والمتغير B يحمل 20 ثم -

OperatorDescriptionExample
+Adds two operandsA + B = 30
-Subtracts second operand from the firstA - B = -10
*Multiplies both operandsA * B = 200
/Divides numerator by de-numeratorB / A = 2
%Modulus Operator and remainder of after an integer divisionB % A = 0
++Increment operator increases integer value by oneA++ = 11
--Decrement operator decreases integer value by oneA-- = 9

## Relational Operators

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

يوضح الجدول التالي جميع العوامل العلائقية التي يدعمها C #. افترض أن المتغير A يحمل 10 والمتغير B يحمل 20 ، إذن -

OperatorDescriptionExample
==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.

## Logical Operators

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 −

OperatorDescriptionExample
&&Called Logical AND operator. If both the operands are non zero then condition becomes true.(A && B) is false.
||Called Logical OR Operator. If any of the two operands is non zero then condition becomes 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.

## Bitwise Operators

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

pqp & qp | qp ^ q
00000
01011
11110
10011

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 −

OperatorDescriptionExample
&Binary AND Operator copies a bit to the result if it exists in both operands.(A & B) = 12, which is 0000 1100
|Binary OR Operator copies a bit if it exists in either operand.(A | B) = 61, which is 0011 1101
^Binary XOR Operator copies the bit if it is set in one operand but not both.(A ^ B) = 49, which is 0011 0001
~Binary Ones Complement Operator is unary and has the effect of 'flipping' bits.(~A ) = -61, which is 1100 0011 in 2's complement due to a signed binary number.
<<Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.A << 2 = 240, which is 1111 0000
>>Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.A >> 2 = 15, which is 0000 1111

## Assignment Operators

There are following assignment operators supported by C# −

OperatorDescriptionExample
=Simple assignment operator, Assigns values from right side operands to left side operandC = 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 operandC += 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 operandC -= 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 operandC *= 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 operandC /= A is equivalent to C = C / A
%=Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operandC %= A is equivalent to C = C % A
<<=Left shift AND assignment operatorC <<= 2 is same as C = C << 2
>>=Right shift AND assignment operatorC >>= 2 is same as C = C >> 2
&=Bitwise AND assignment operatorC &= 2 is same as C = C & 2
^=bitwise exclusive OR and assignment operatorC ^= 2 is same as C = C ^ 2
|=bitwise inclusive OR and assignment operatorC |= 2 is same as C = C | 2

## Miscellaneous Operators

There are few other important operators including sizeof, typeof and ? : supported by C#.

OperatorDescriptionExample
sizeof()Returns the size of a data type.sizeof(int), returns 4.
typeof()Returns the type of a class.typeof(StreamReader);
&Returns the address of an variable.&a; returns actual address of the variable.
*Pointer to a variable.*a; creates pointer named 'a' to a variable.
? :Conditional ExpressionIf Condition is true ? Then value X : Otherwise value Y
isDetermines whether an object is of a certain type.If( Ford is Car) // checks if Ford is an object of the Car class.
asCast without raising an exception if the cast fails.Object obj = new StringReader("Hello");

## Operator Precedence in C#

Operator precedence determines the grouping of terms in an expression. This affects evaluation of an expression. Certain operators have higher precedence than others; for example, the multiplication operator has higher precedence than the addition operator.

For example x = 7 + 3 * 2; here, x is assigned 13, not 20 because operator * has higher precedence than +, so the first evaluation takes place for 3*2 and then 7 is added into it.

Here, operators with the highest precedence appear at the top of the table, those with the lowest appear at the bottom. Within an expression, higher precedence operators are evaluated first.

تحدد أسبقية عامل التشغيل تجميع المصطلحات في تعبير ما. يؤثر هذا على تقييم التعبير. هناك عوامل معينة لها أسبقية أعلى من غيرها ؛ على سبيل المثال ، عامل الضرب له أسبقية أعلى من عامل الإضافة. على سبيل المثال x = 7 3 * 2 ؛ هنا ، تم تعيين x 13 ، وليس 20 لأن عامل التشغيل * له أسبقية أعلى من ، لذلك يتم إجراء التقييم الأول لـ 3 * 2 ثم يتم إضافة 7 إليه. هنا ، تظهر العوامل ذات الأولوية الأعلى أعلى الجدول ، بينما تظهر العوامل الأقل أولوية في الجزء السفلي. ضمن التعبير ، يتم تقييم عوامل الأولوية الأعلى أولاً.

CategoryOperatorAssociativity
Postfix() [] -> . ++ - -Left to right
Unary+ - ! ~ ++ - - (type)* & sizeofRight to left
Multiplicative* / %Left to right