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.
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Higher Precedence
Lower Precedence |
Logical Operator |
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! |
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&& |
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|| |
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.
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Higher Precedence
Lower Precedence |
Logical Operator |
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! |
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&& |
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|| |
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.
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Higher Precedence
Lower Precedence |
Logical Operator |
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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.
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Higher Precedence
Lower Precedence |
Logical Operator |
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Notice: You can always use parentheses to change the default precedence.