Logical Operators.
These operators are used to combine the results of two or more conditions. An expression containing logical operator returns either 0 or 1 depending upon whether expression results true or false. Logical operators are commonly used in decision making in C programming.
|
Operator |
Meaning |
Example |
Return value |
|
&& |
Logical AND |
(9>2)&&(17>2) |
1 |
|
|| |
Logical OR |
(9>2) || (17 = = 7) |
1 |
|
! |
Logical NOT |
29!=29 |
0 |
Logical AND : If any one condition false the complete condition becomes false.
Truth Table
|
Op1 |
Op2 |
Op1 && Op2 |
|
true |
true |
true |
|
true |
false |
false |
|
false |
true |
false |
|
false |
false |
false |
Logical OR : If any one condition true the complete condition becomes true.
Truth Table
|
Op1 |
Op2 |
Op1 // Op2 |
|
true |
true |
true |
|
true |
false |
true |
|
false |
true |
true |
|
false |
false |
false |
Logical Not : This operator reverses the value of the expression it operates on i.e, it makes a true expression false and false expression true.
|
Op1 |
Op1 ! |
|
true |
false |
|
false |
true |