What is the list of logical operators in Python?

Frances 76 Published: 06/21/2024

What is the list of logical operators in Python?

Here is the list of logical operators in Python:

and: The and operator returns True if both operands are true, and False otherwise.

Example:

>>> True and True
True



True and False



False



False and True



False



False and False



False

or: The or operator returns True if at least one operand is true, and False otherwise.

Example:

>>> True or True
True



True or False



True



False or True



True



False or False



False

not: The not operator inverts the boolean value of its operand.

Example:

>>> not True
False



not False



True

in: The in operator checks if a value is present in a sequence (such as a list or tuple), or in a dictionary, and returns True if it is, and False otherwise.

Example:

>>> 1 in [1, 2, 3]
True



'hello' in {'hello': 'world', 'goodbye': 'cruel world'}



True



4 in [1, 2, 3]



False

not in: The not in operator checks if a value is not present in a sequence (such as a list or tuple), or in a dictionary, and returns True if it is not, and False otherwise.

Example:

>>> 4 not in [1, 2, 3]
True



'goodbye' not in {'hello': 'world', 'goodbye': 'cruel world'}



True



1 not in [1, 2, 3]



False

Note that the in and not in operators only work on sequences (such as lists or tuples) and dictionaries.

is: The is operator checks if two objects are the same instance, and returns True if they are, and False otherwise.

Example:

>>> a = [1, 2, 3]; b = [1, 2, 3]; c = [4, 5, 6]



a is b



False



a is c



False



a == b



True



a is a



True

is not: The is not operator checks if two objects are not the same instance, and returns True if they are not, and False otherwise.

Example:

>>> a = [1, 2, 3]; b = [1, 2, 3]; c = [4, 5, 6]



a is not b



True



a is not c



True



a != b



True



a is not a



False

Note that the is and is not operators only work on instances (i.e., objects), and not on values or variables.

In summary, Python's logical operators include:

and: returns True if both operands are true, and False otherwise. or: returns True if at least one operand is true, and False otherwise. not: inverts the boolean value of its operand. in: checks if a value is present in a sequence or dictionary, and returns True if it is, and False otherwise. not in: checks if a value is not present in a sequence or dictionary, and returns True if it is not, and False otherwise. is: checks if two objects are the same instance, and returns True if they are, and False otherwise. is not: checks if two objects are not the same instance, and returns True if they are not, and False otherwise.

What are operators in Python W3schools?

I'm happy to respond in English!

According to W3Schools, in Python, an operator is a symbol used to perform operations on values and expressions. In other words, operators are used to manipulate data and variables in your code.

Python provides various types of operators, including:

Arithmetic Operators: These operators are used for mathematical calculations, such as addition (+), subtraction (-), multiplication (*), division (/ or // for integer division), modulus (%), exponentiation (**).

Example: x = 5; y = 3; print(x + y) (output: 8)

Comparison Operators: These operators are used to compare values and return a boolean result, such as equal (==), not equal (!= or !=), greater than (>), less than (<), greater than or equal to (>=), less than or equal to (<=), and identical (is or ==).

Example: x = 5; y = 3; print(x > y) (output: True)

Logical Operators: These operators are used to combine multiple conditions and return a boolean result, such as AND (&), OR (|), NOT (~ or not).

Example: x = 5; y = 3; print(x > y and x != 0) (output: False)

Assignment Operators: These operators are used to assign values to variables, such as addition assignment (+=), subtraction assignment (-=), multiplication assignment (*=), division assignment (/= or //= for integer division), modulus assignment (%=).

Example: x = 5; x += 3; print(x) (output: 8)

Bitwise Operators: These operators are used to manipulate binary numbers, such as bitwise AND (&), OR (|), XOR (^), NOT (~ or not), left shift (<<), and right shift (>>).

Example: x = 5; y = 3; print(x & y) (output: 1)

Membership Operators: These operators are used to test if a value is present in a sequence, such as in (in) or not in (not in).

Example: fruits = ['apple', 'banana']; print('apple' in fruits) (output: True)

Identity Operators: These operators are used to compare the memory address of two values, such as is (is) and is not (is not or !=).

Example: x = 5; y = 3; print(x is y) (output: False)

Power Operator: This operator is used to calculate the power of a number, denoted by two asterisks (**).

Example: print(2 ** 3) (output: 8)

In Python, these operators can be used in various combinations to create complex expressions and calculations. For example, you can use parentheses to group operations or use the precedence rules for each operator type.

Overall, understanding the different types of operators in Python is crucial for writing efficient, readable, and effective code!