JavaScript comparison and logical operator testing the conditional statement that either return true
or false
.
Comparison Operators
Operator | Description |
---|---|
== | Equal To |
=== | Equal Both Value and Type |
!= | Not Equal To |
!== | Not Equal To Either Type or Value |
> | Greater Than |
< | Less Than |
>= | Greater Than or Equal To |
<= | Less Than or Equal To |
Equal (==
)
It doesn’t matter the value type, if both value are same, it will return true
. Otherwise, it will return false
.
5 == 5 // true
5 == "5" // true
5 == "a" // false
5 == 10 // false
Strict Equal ===
Strict equal will return true
is both type and value are same. If the type or value not the same, it will return false
.
5 === 5 // true
5 === "5" // false
5 === "a" // false
5 === 10 // false
Not Equal !=
If the
5 != 5 // false
5 != "5" // false
5 != "a" // true
5 != 10 // true
Strict Not Equal !==
5 !== 5 // false
5 !== "5" // true
5 !== "a" // true
5 !== 10 // true
Greater Than >
If the value is greater than the left operand, it will return true
. Otherwise, it will return false
.
5 > 3 // true
5 > 5 // false
5 > 10 // false
Less Than <
If the value is less than the left operand, it will return true
. Otherwise, it will return false
.
5 < 3 // false
5 < 5 // false
5 < 10 // true
Greater Than or Equal To >=
5 >= 3 // true
5 >= 5 // false
5 >= 10 // true
Less Than or Equal To <=
5 <= 3 // true
5 <= 5 // false
5 <= 10 // true
Logical Operators
Operator | Description |
---|---|
&& | Logical AND: true if both operand are true, else evaluates as false |
|| | Logical OR: true if either one operand are true. false if both operand are false |
! | Logical NOT: true if the operand is !false and vice-versa. |
Logical AND Operator
true
if both operand are true, else evaluates as false
true && true; // true
true && false; // false
false && true; // false
false && false; //false
Logical OR Operator
true
if either one operand are true. false
if both operand are false
true || true; // true
true || false; // true
false || true; // true
false || false; //false
Logical NOT Operator
true
if the operand is !false
and vice-versa.
!true; // false
!false; // true