Python logical operators

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Python Operators &these are words that tell the Python interpreter to perform certain tasks. Boolean operators are used to combine multiple Boolean operators.

There are three Boolean operators in Python.

 3 Python Boolean Operators width =


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Block diagram

The image below shows a block diagram of logical operators.

 Block Diagram of Logical Operators width =

Boolean AND Operator in Python

Assertion is returned, to be true if both statements / conditions are true.



Example:

 a = 20 b = 10 if a & gt; 0 and b & gt; 0 print ("Both a and b are positive numbers.") 

Output: both a and b &positive numbers.

The logical OR operator in Python

The assertion returns true when any of the assertions / conditions are true.

Example:

 a = 20 b = -10 if a & gt; 0 or b & gt; 0 print ("True") 

Output: True

The NOT logical operator in Python

This operator works on a single value. It reverses the result, that is, if the statement is true, the not operator turns the statement false and vice versa.

Example:

 a = 50 print (not (a% 4 or a & gt; 0)) 

Output: False

In the above example, the condition a% 4 or a & gt; 0 evaluates to True. But since we used the not operator, it changes the result, i.e. gives result as False.



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log

Python"s equivalent of && (logical-and) in an if-statement

5 answers

delete By delete

Here"s my code:

def front_back(a, b):
  # +++your code here+++
  if len(a) % 2 == 0 && len(b) % 2 == 0:
    return a[:(len(a)/2)] + b[:(len(b)/2)] + a[(len(a)/2):] + b[(len(b)/2):] 
  else:
    #todo! Not yet done. :P
  return

I"m getting an error in the IF conditional.
What am I doing wrong?

934

Answer #1

You would want and instead of &&.

934

Answer #2

Python uses and and or conditionals.

i.e.

if foo == "abc" and bar == "bac" or zoo == "123":
  # do something

log

How do you get the logical xor of two variables in Python?

5 answers

Zach Hirsch By Zach Hirsch

How do you get the logical xor of two variables in Python?

For example, I have two variables that I expect to be strings. I want to test that only one of them contains a True value (is not None or the empty string):

str1 = raw_input("Enter string one:")
str2 = raw_input("Enter string two:")
if logical_xor(str1, str2):
    print "ok"
else:
    print "bad"

The ^ operator seems to be bitwise, and not defined on all objects:

>>> 1 ^ 1
0
>>> 2 ^ 1
3
>>> "abc" ^ ""
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for ^: "str" and "str"
794

Answer #1

If you"re already normalizing the inputs to booleans, then != is xor.

bool(a) != bool(b)

We hope this article has helped you to resolve the problem. Apart from Python logical operators, check other diag-related topics.

Want to excel in Python? See our review of the best Python online courses 2022. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Walter Porretti

Rome | 2022-12-07

Maybe there are another answers? What Python logical operators exactly means?. Will use it in my bachelor thesis

Julia Porretti

Singapore | 2022-12-07

Simply put and clear. Thank you for sharing. Python logical operators and other issues with log was always my weak point 😁. I just hope that will not emerge anymore

Ken Danburry

Berlin | 2022-12-07

I was preparing for my coding interview, thanks for clarifying this - Python logical operators in Python is not the simplest one. I just hope that will not emerge anymore

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