# CS Operators

An operator is simply a symbol for performing operations. Many types of operations may be available, such as arithmetic, logical, bitwise etc.

The following types of operators are available in C# language for different types of operation.

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

The table below demonstrates all C# supported arithmetic operators. Assume that variable A is 20 and variable B is 30.

 Operator Description Example + Adds two operands A + B = 50 - Subtracts second operand from the first A - B = -10 * Multiplies both operands A * B = 600 / Divides numerator by de-numerator B / A = 1.5 % Modulus Operator and remainder of after an integer division B % A = 0 ++ Increment operator increases integer value by one A++ = 21 -- Decrement operator decreases integer value by one A-- = 19

The table below demonstrates all C# supported relation operators. Assume that variable A is 20 and variable B is 30.

 Opertaor 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.

The table below demonstrates all C# supported Logical operators. Assume that variable A is 20 and variable B is 30.

 Operator Description Example && 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.

The operator works on bits and perform bit by bit operation. Assume that variable A is 20 and variable B is 30. The

truth tables are as follows for `&`, `|`, and `^`

 P q p&q p|q p^q 0 0 0 0 0 0 1 0 1 1 1 1 1 1 0 1 0 0 1 1

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

A = 0011 1100

B = 0000 1101

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

The table below demonstrates all C# supported Logical operators. Assume that variable A is 60 and variable B is 13.

 Operators Descriptions Example & 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

The table below demonstrates all C# supported Assignment operators.

 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 <<= Left shift AND assignment operator C <<= 2 is same as C = C << 2 >>= Right shift AND assignment operator C >>= 2 is same as C = C >> 2 &= Bitwise AND assignment operator C &= 2 is same as C = C & 2 ^= bitwise exclusive OR and assignment operator C ^= 2 is same as C = C ^ 2 |= bitwise inclusive OR and assignment operator C |= 2 is same as C = C | 2

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

 Operator Description Example 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 Expression If Condition is true ? Then value X : Otherwise value Y is Determines whether an object is of a certain type. If( Ford is Car) // checks if Ford is an object of the Car class. as Cast without raising an exception if the cast fails. Object obj = new StringReader("Hello"); StringReader r = obj as StringReader;

The operator precedence indicates which operator are first and next evaluated. The association specifies the direction of the operators to measure, either left-to-right or right-to-left.

For Example:

``````
int data=20+5*5

``````

The variable "data" will contain 35 as * (multiplicative operator) is evaluated before + (additive operator).

C # operators ' precedence and association are provided below.

 Operator Description Example Postfix () [] -> . ++ - - Left to right Unary + - ! ~ ++ - - (type)* & sizeof Right to left Multiplicative * / % Left to right Additive + - Left to right Shift << >> Left to right Relational < <= > >= Left to right Equality == != Left to right Bitwise AND & Left to right Bitwise XOR ^ Left to right Bitwise OR | Left to right Logical AND && Left to right Logical OR || Left to right Conditional ?: Right to left Assignment = += -= *= /= %=>>= <<= &= ^= |= Right to left Comma , Left to right