Helpful for Beginners C language

1. Topic:
Logical Operators and
Conditional Operator
Presented by:
Abdul Rehman (BSSE09151014)

2. Three Logical Operators
1. && (Logical AND)
2. | | (Logical OR)
3. ! (Logical NOT)
Logical Operators

3.  In this operator, the condition is true if both
conditions are true.
if ( gender == 1 && age >= 65 )
senior++;
&& (Logical AND)

4. Table of Logical AND
Operand 1 Operand 2 Results
x y x&&y
0 0 0
0 Non-Zero 0
Non-Zero 0 0
Non-Zero Non-Zero 1

5. • Use the AND operator on the bit patterns 10011000 and 00101010.
Example

6. Example Program

7. Example

8.  In this operator , the program is executed if any one
of the two conditions is true.
if (semesterAvg >= 90 || finalExam >=90 )
printf("Student grade is A“);
| | (Logical OR)

9. Operand 1 Operand 2 Result
x y x | | y
0 0 0
0 Non-Zero 1
Non-Zero 0 1
Non-Zero Non-Zero 1
Table of Logical OR

10. Use the OR operator on the bit patterns 10011001
and 00101110.
Example

11. Example Program

12. Int x,y,z;
if (x<y | | x<z)
printf(“x is small”);
Example

13.  If a condition is true then Logical NOT operator will
make false and vice versa.
if ( !( grade == 20 ) )
printf(“hello world“);
Alternative:
if ( grade != 20 )
printf(“hello world“);
! (Logical NOT)

14. Operand 1 Operand 2 Result Result
x y !x !y
0 0 1 1
0 Non-Zero 1 0
Non-Zero 0 0 1
Non-Zero Non-Zero 0 0
Table of Logical NOT

15. Use the NOT operator on the bit pattern 10011000.
Example

16. Example Program

17. Ternary operator are used to
reduce the code the in a short
form.
Conditional
Operator

18.  General form is,
(expression 1 ? expression 2 : expression 3);
 Conditional operators ? and : are sometimes called
ternary operators
 if expression 1 is true, then the value returned will be
expression 2, otherwise the value returned will be
expression 3
Syntax

20. Nested conditional operator
(expression 1 ? expression 2 : expression 3);
Single
condition or
compound
condition
(expression 1 ? expression 2 : expression 3);
(expression 1 ? expression 2 : expression 3);

21. Example program
main( )
{
float sal ;
printf ("Enter the salary" ) ;
scanf ( "%f", &sal ) ;
( (sal < 40000 && sal > 25000) ? printf ( "Manager" ) :
(( sal < 25000 && sal > 15000 ) ? printf ( "Accountant") :
printf ( "Clerk" ) ));
}

22. Any Question???