LOGICAL OPERATOR IN C++

logical operator in c++

LOGICAL OPERATOR IN C++:

 In C programming different types of operator is used to perform a special and specific task such as Assignment operator and Airthematic operation likely those logical operator also used to check the logic by identifying the given condition.

We used basic three type of logical operator in C and C++ during programming which are as follow

            1.       And operator  =&&

            2.       Or operator     =||

            3.       Not operator   =!

   AND OPERATOR (&&):

 Type of operator which is used when we have to check two or more condition at a time. && operator allow two or more conditions to be combined in an if statement. The flow of control will execute the given instruction if the all given condition is true otherwise control execute the other instruction after the instruction which should execute in under supervision of if statement.

  

 In above program the result will display on screen will be ‘Grade B’ gets printed if both the conditions evaluate to true. If one of the conditions evaluate to false then the whole thing is treated as false. if the both condition given above does not true then the control execute the instruction in supervision of else statement.

Program used && operator.

OR OPERATOR (||):

It also used when we have to check two or more condition at a time. || Operator allow two or more conditions to be combined in an if statement. The flow of control will execute the given instruction if at least one of the given conditions is true. Otherwise control execute the other instruction after the instruction which should execute in under supervision of if statement.

Example:

{

int a=3, b=5, c=3;

if ( a==b || a==c || b==c)

printf(“ Given number is same”);

else

printf(“ no numbers are same”);

}

 The above program after executed will display ‘Given number is same’, because the condition a==c is true in this case. The feature of OR operator is that it will executed the instruction in super vision of if statement if one of the given is true.

Program used OR || operator.

NOT OPERATION (!);

 The third logical operator is the NOT operator, written as !. This operator reverses the result of the expression it operates on. For example, if the expression evaluates to a non-zero value, then applying ! operator to it results into a 0. Vice versa.

 Here is an example of the NOT operator applied to a relational expression

 ! (y < 10 )

 This means “not y less than 10”. In other words, if y is less than 10, the expression will be false, since (y < 10) is true. We can express the same condition as (y >= 10).

program used NOT ! operator.