JavaScript Comparison and Logical Operators

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Comparison Operators

Comparison operators are used in logical statements to determine equality or difference between variables or values.

Given that x=5, the table below explains the comparison operators:

Operator

Description

Example

==

is equal to

x==8 is false

===

is exactly equal to (value and type)

x===5 is true
x==="5" is false

!=

is not equal

x!=8 is true

>

is greater than

x>8 is false

<

is less than

x<8 is true

>=

is greater than or equal to

x>=8 is false

<=

is less than or equal to

x<=8 is true


 


 

Logical Operators

Logical operators are used to determine the logic between variables or values.

Given that x=6 and y=3, the table below explains the logical operators:

Operator

Description

Example

&&

and

(x < 10 && y > 1) is true

||

or

(x==5 || y==5) is false

!

not

!(x==y) is true


 


 


 


 

Source: http://www.w3schools.com/js/js_comparisons.asp

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