Are the operators && and and interchangeable in PHP?

Asked By: Brita Offroy | Last Updated: 8th February, 2020
Category: technology and computing programming languages
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Explanation: The result of both operator is different whenever operands are same. The first expression, $bool = TRUE && FALSE; evaluates to FALSE because first && operation is performed, then the result to assigned to the variable $bool because precedence of && operator is higher than the precedence of =.

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Also to know is, are the operators && and and interchangeable?

Logical operators and bitwise operators might sometimes work the same if you are lucky, but they are not the same, and can sometimes yield completely different results. Be careful not to confuse & and &&. They are not interchangeable!

Similarly, what does && mean in PHP? up vote 5. AND operation: & -> will do the bitwise AND operation , it just doing operation based on the bit values. && -> It will do logical AND operation. It is just the check the values is true or false. Based on the boolean value , it will evaluation the expression.

Thereof, what is the difference between & and && in C?

There actually are simple & refers to bit-wise AND and && refers to logical AND in C. Both are binary operators, that means, both need two operands to operate upon. & performs LOGICAL AND operation on binary values of both operands, and outputs value of result of the AND operation.

What is the difference between && and?

In && case both are true then true otherwise false. && is used to perform and operation means if anyone of the expression/condition evaluates to false whole thing is false. || is used to perform or operation if anyone of the expression/condition evaluates to true whole thing becomes true.

38 Related Question Answers Found

What is && called?

&& Called Logical AND operator.

What is meaning of && in C?

The logical AND operator (&&) returns the boolean value TRUE if both operands are TRUE and returns FALSE otherwise. The operands are commonly relational or equality expressions. The first operand is completely evaluated and all side effects are completed before continuing evaluation of the logical AND expression.

What does && mean in C++?

&& is a new reference operator defined in the C++11 standard. int&& a means "a" is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes an r-value expression. Simply put, an r-value is a value that doesn't have a memory address.

Is && evaluated before?

The logical-AND operator ( && ) has higher precedence than the logical-OR operator ( || ), so q && r is grouped as an operand. Since the logical operators guarantee evaluation of operands from left to right, q && r is evaluated before s-- .

What does && mean in SQL?


0. If you're working with PostgreSQL, '&&' means overlap (have elements in common): example: ARRAY[1,4,3] && ARRAY[2,1] https://www.postgresql.org/docs/9.1/static/functions-array.html. https://stackoverflow.com/questions/4105658/the-difference-between-and-and-in-sql/52384049#52384049.

Is set a conjunction?

In logic, mathematics and linguistics, And (∧) is the truth-functional operator of logical conjunction; the and of a set of operands is true if and only if all of its operands are true. The logical connective that represents this operator is typically written as ∧ or ⋅ . In set theory, intersection.

What does the AND operator do?

AND operator. The AND operator is a Boolean operator used to perform a logical conjunction on two expressions -- Expression 1 And Experession 2. AND operator returns a value of TRUE if both its operands are TRUE, and FALSE otherwise.

What is & operator in C#?

The conditional logical AND operator && , also known as the "short-circuiting" logical AND operator, computes the logical AND of its operands. The result of x && y is true if both x and y evaluate to true . Otherwise, the result is false . If x evaluates to false , y is not evaluated.

What is && mean?

&& is a boolean operator, which means "and". For it to become true, both of the statements must be true. If one of them is false, it becomes false. if you want true and false to return true, you should use ||, which means or. Example: true && true; //this will return true, both are true.

How does Bitwise work?


How Bitwise Or works. On a cell-by-cell basis, the bitwise operator evaluates the binary representation of the values of the two inputs. The Boolean Or is performed, producing a new binary value. When the value of this number is printed as a decimal integer, its base10 value is assigned to the output.

What are operators in C?

An operator is a symbol that tells the compiler to perform a certain mathematical or logical manipulation. Operators are used in programs to manipulate data and variables. C operators can be classified into following types: Arithmetic operators. Bitwise operators.

What is << operator in C?

An operator is a symbol that tells the compiler to perform specific mathematical or logical functions. C language is rich in built-in operators and provides the following types of operators − Arithmetic Operators. Relational Operators. Logical Operators.

What does || mean in C++?

Logical OR operator: ||
The logical OR operator (||) returns the boolean value TRUE if either or both operands is TRUE and returns FALSE otherwise.

What is difference between logical and Bitwise and operator?

Logical operators take as input(s) boolean values, and provide as output(s) boolean values. Bitwise operators take as input(s) integer values (whose bits are the data), and provide as output(s) integer values (whose bits are the data).

What is pre increment?


Pre-increment operator: A pre-increment operator is used to increment the value of a variable before using it in a expression. In the Pre-Increment, value is first incremented and then used inside the expression.

What is the -> in C?

c pointers dereference. The dot ( . ) operator is used to access a member of a struct, while the arrow operator ( -> ) in C is used to access a member of a struct which is referenced by the pointer in question.

What does <> mean in PHP?

Stands for "Hypertext Preprocessor." (It is a recursive acronym, if you can understand what that means.) PHP is an HTML-embedded Web scripting language. This means PHP code can be inserted into the HTML of a Web page. When a PHP page is accessed, the PHP code is read or "parsed" by the server the page resides on.