A very complex Boolean expression may use several logical operators like the one shown here

PHP

($x > $y) || ($x == 5) && ($x <= $z) || !($z == 1)

So, a reasonable question is “which logical operation is performed first?

The order of precedence is: logical complements (!) are performed first, logical conjunctions (&&) are performed next, and logical disjunctions (||) are performed at the end.

 Higher Precedence

Lower Precedence

Logical Operator

!

&&

||

Java, C++, C#

(x > y) || (x == 5) && (x <= z) || !(z == 1)

So, a reasonable question is “which logical operation is performed first?”

The order of precedence is: logical complements (!) are performed first, logical conjunctions (&&) are performed next, and logical disjunctions (||) are performed at the end.

 Higher Precedence

arrow_up

Lower Precedence

Logical Operator

!

&&

||

Visual Basic

(x > y) Or (x = 5) And (x <= z) Or Not(z = 1)

So, a reasonable question is “which logical operation is performed first?”

The order of precedence is: logical complements (Not) are performed first, logical conjunctions (And) are performed next, and logical disjunctions (Or) are performed at the end.

 Higher Precedence

arrow_up

Lower Precedence

Logical Operator

Not

And

Or

Python

(x > y) or (x == 5) and (x <= z) or not(z == 1)

So, a reasonable question is “which logical operation is performed first?”

The order of precedence is: logical complements (not) are performed first, logical conjunctions (and) are performed next, and logical disjunctions (or) are performed at the end.

 Higher Precedence

arrow_up

Lower Precedence

Logical Operator

not

and

or

Notice: You can always use parentheses to change the default precedence.

Leave a Reply

Your email address will not be published. Required fields are marked *

This article is taken from a book of mine. If you enjoyed it, please visit my author's page inand check out all of my books!