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csharp operators





C# Operators

 

  • Operators allow the processing on the primitive data types and objects.
  • Operators take one or more operand as input and give a result after applying operation over them. Like in “a+b”, ‘a’ and ‘b’ are the operands and ‘+’ is an operator which performs the add operation on ‘a’ and ‘b’ operands.
  • C# contains reach set of operators like arithmetic, relational, logical etc.

In C# Operators can be divided into several categories as given below in the table:

 

Arithmetic Operators

 

    • Arithmetic Operators are the simplest operators.
    • These are used for the purpose of mathematical operation like addition, subtraction etc.
    • Here is a list of all arithmetic operators in the given table:
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 B / A = 2
% Modulus Operator and remainder of after an integer division B % A = 0
++ Increment operator increases integer value by one A++ = 11
Decrement operator decreases integer value by one A– = 9

Here is an Example of the Arithmetic Operators please go through that:

 

Example

 

using System;
namespace Operators
{
class Arithmetic
{
static void Main()
{
int x = 10;
int y = 5;
int z;
z = x + y;//Addition Operation
Console.WriteLine(“nAddition of x and y is z={0}”,z);
z = x – y;//Subtraction Operation
Console.WriteLine(“nSubtraction of x and y is z={0}”,z);
z = x * y;//Multiplication Operation
Console.WriteLine(“nMultiplication of x and y is z={0}”,z);
z = x / y;//Division Operation
Console.WriteLine(“nDivision of x and y is z={0}”,z);
z = x % y;//Modulus Operation
Console.WriteLine(“nModulus of x and y is z={0}”,z);
x++;y++;//Increment Operation
Console.WriteLine(“nAfter Increment value of x={0} and y={1}”, x, y);
x–; y–;//Decrement Operation
Console.WriteLine(“nAfter Decrement value of x={0} and y={1}”, x, y);
Console.ReadLine();
}
}
}

output of the above program is given below:

 

Addition of x and y is z=15
Subtraction of x and y is z=5
Multiplication of x and y is z=50
Division of x and y is z=2
Modulus of x and y is z=0
After Increment value of x=11 and y=6
After Decrement value of x=10 and y=5

    • Assignment Operators

 

      • Assignment operators are used to assign values to variables.
      • Here is a list of Assignment operators in the given table:
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

Here is an Example of assignment operators please go through that:

Example

 

using System;
namespace Operators
{
class Assignment
{
static void Main()
{
int x = 10;
int y = 5;
x = y;//simple assignment
Console.WriteLine(“nResult of x=y:x={0}”,x);
x += y;//addition and assignment
Console.WriteLine(“nResult of x+=y:x={0}”,x);
x -= y;//subtraction and assignment
Console.WriteLine(“nResult of x-=y:x={0}”,x);
x*=y;//multiplication and assignment
Console.WriteLine(“nResult of x*=y:x={0}”,x);
x /= y;//division and assignment
Console.WriteLine(“nResult of x/=y:x={0}”,x);
x %= y;//modulud and assignment
Console.WriteLine(“nResult of x%=y:x={0}”,x);
Console.ReadLine();
}
}
}

Output of the above program is as following:

 

Result of x=y:x=5
Result of x+=y:x=10
Result of x-=y:x=5
Result of x*=y:x=25
Result of x/=y:x=5
Result of x%=y:x=0

Bitwise Operator

 

      • Bitwise operators are used to perform operation on the binary representation of a numeric value.
      • Here is the list of Bitwise operators in the given table:
Operator Description 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

Here is an Example of bitwise operators please go through it:

 

Example

 

using System;
namespace Operators
{
class Bitwise
{
static void Main()
{
int x = 10;// binary value of 10=1010
int y = 5;// binary value of 5=0101
int z;
z = x & y;//bitwise And operation
Console.WriteLine(“nResult of x&y:z={0}”,z);
z = x | y;//bitwise Or operation
Console.WriteLine(“nResult of x|y:z={0}”, z);
z = ~x;//bitwise Not operation
Console.WriteLine(“nResult of ~x:z={0}”, z);
z = x ^ y;//bitwise Xor operation
Console.WriteLine(“nResult of x^y:z={0}”, z);
z = x << 1;//bitwise Left shift operation
Console.WriteLine(“nResult of x<<1:z={0}”, z);
z = x >> 1;//bitwise right shift operation
Console.WriteLine(“nResult of x>>1:z={0}”, z);
Console.ReadLine();
}
}
}

output of the above program is as follows:

 

Result of x&y:z=0
Result of x|y:z=15
Result of ~x:z=11
Result of x^y:z=15
Result of x<<1:z=20
Result of x>>1:z=5

Logical Operators

 

      • Logical operators perform operation on Boolean Expression or Boolean data type.
      • Here is the list of Boolean operators in the given table:
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.
    • Here is the truth table for each logical operator:

      • Logical And Operator (&&):
Operand1 Operand2 Operand1&&Operand2
true true true
true false false
false true false
false false false
      • Logical Or Operator (||)
Operand1 Operand2 Operand1||Operand2
true true true
true false true
false true true
false false false
      • Logical Not Operator(!)
Operand !Operand
true false
false true

Here is an Example of Logical Operators please goes through it:

 

Example

 

using System;
namespace Operators
{
class Logical
{
static void Main()
{
bool b1 = true;
bool b2 = false;
bool c;
c = b1 && b2;//Logical And Operation
Console.WriteLine(“nResult of b1 && b2:c={0}”,c);
c = b1 || b2;//Logical Or Operation
Console.WriteLine(“nResult of x||y:c={0}”, c);
c = !b1;//Logical Not Operator
Console.WriteLine(“nResult of !b1:c={0}”, c);
Console.ReadLine();
}
}
}

Here is the output of the above program:

 

Result of b1&&b2:c=False
Result of b1||b2:c=True
Result of !b1:c=False

Relational Operators

 

      • Relation operators are used for the comparison between two values.
      • Here is the list of table containing the various relational operators:
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.

Here is an Example of the relational operator please go through it:

 

Example

 

using System;
namespace Operators
{
class Relational
{
static void Main()
{
int a = 10;
int b = 12;
int c = 6;
Console.WriteLine(“na Console.WriteLine(“na<=b is {0}”, (a <= b));
Console.WriteLine(“na>c is {0}”, (a > c));
Console.WriteLine(“na>=c is {0}”, (a >= b));
Console.WriteLine(“na==b is {0}”, (a == b));
Console.WriteLine(“na!=b is {0}”, (a != b));
Console.ReadLine();
}
}
}

The output of the above program is given below:

 

a a<=b is True
a>c is True
a>=c is False
a==b is False
a!=b is True

Other Operators

 

In C# there are several other operators which are used for the special task like type, ?, sizeof operator etc listed below in the table:

 

        OperatorDescriptionExamplesizeof()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 YisDetermines 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”);

StringReader r = obj as StringReader;

Here is an Example which is defined the operators mentioned in the above table:

 

Example

 

using System;
namespace Operators
{
class Relational
{
static void Main()
{
int a = 10;
int b = 12;
int? c = 6;
Console.WriteLine(a>b?”a>b”:”a<b”);//Conditional operator
Console.WriteLine(“Size of int data type is {0}”,sizeof(int));//sizeof operator
Console.WriteLine(DateTime.Now);//access operator
Console.WriteLine(c ?? -1); // ‘??’ operator
Console.ReadLine();
}
}
}

output of the above program is given below:

 

a Size of int data type is 4
1/19/2014 4:53:49 PM
6



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