JavaScript Logical Operators

February 8, 2021 10:45 am IST

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The logical operators returns a boolean value by determining the logic between the values.

And Operator

And Operator returns true only if both the condition in the LHS and RHS are true. Otherwise it returns false.

HTML Online Editor

<!DOCTYPE html> <html> <body> <script> var num1 = 5; var num2 = 3; document.write(num1 < 10 && num2 < 10); </script> </body> </html>

The following are the list of logical operators available in JavaScript.

Operator	Explanation	Operation	Result
&&	and	(5 < 10 && 3 < 10)	true
\|\|	or	(5 < 10 \|\| 3 > 10)	true
!	not	!(5 > 3)	false

OR Operator returns true if any of the conditions in the LHS or RHS is true. Otherwise it returns false.

HTML Online Editor

<!DOCTYPE html> <html> <body> <script> var num1 = 5; var num2 = 3; document.write(num1 < 10 || num2 > 10); </script> </body> </html>

Not Operator reverses the logic of a result.

HTML Online Editor

<!DOCTYPE html> <html> <body> <script> var num1 = 5; var num2 = 3; document.write(!(num1 > num2)); </script> </body> </html>

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