The else clause is only executed after the while condition is evaluated to be false.
Thus, if you break out of the loop, or if an exception is raised, the else won't be executed (since the while condition has not been evaluated to be false yet).
One way to think about it is as an if/else construct with respect to the condition:
if condition:
handle_true()
else:
handle_false()
is analogous to the looping construct:
while condition:
handle_true()
else:
# condition is false now, handle and go on with the rest of the program
handle_false()
An example might be along the lines of:
while value < threshold:
if not process_acceptable_value(value):
# something went wrong, exit the loop; don't pass go, don't collect 200
break
value = update(value)
else:
# value >= threshold; pass go, collect 200
handle_threshold_reached()
Top answer 1 of 13
499
The else clause is only executed after the while condition is evaluated to be false.
Thus, if you break out of the loop, or if an exception is raised, the else won't be executed (since the while condition has not been evaluated to be false yet).
One way to think about it is as an if/else construct with respect to the condition:
if condition:
handle_true()
else:
handle_false()
is analogous to the looping construct:
while condition:
handle_true()
else:
# condition is false now, handle and go on with the rest of the program
handle_false()
An example might be along the lines of:
while value < threshold:
if not process_acceptable_value(value):
# something went wrong, exit the loop; don't pass go, don't collect 200
break
value = update(value)
else:
# value >= threshold; pass go, collect 200
handle_threshold_reached()
2 of 13
151
The else clause is executed if you exit a block normally, by hitting the loop condition or falling off the bottom of a try block. It is not executed if you break or return out of a block, or raise an exception. It works for not only while and for loops, but also try blocks.
You typically find it in places where normally you would exit a loop early, and running off the end of the loop is an unexpected/unusual occasion. For example, if you're looping through a list looking for a value:
for value in values:
if value == 5:
print "Found it!"
break
else:
print "Nowhere to be found. :-("
W3Schools
w3schools.com › python › gloss_python_while_else.asp
Python While Else
Python Dictionaries Access Items Change Items Add Items Remove Items Loop Dictionaries Copy Dictionaries Nested Dictionaries Dictionary Methods Dictionary Exercises Code Challenge Python If...Else · Python If Python Elif Python Else Shorthand If Logical Operators Nested If Pass Statement Code Challenge Python Match · Match Code Challenge Python While Loops ·
TIL you can use else with a while loop
You can also use it with for! More on reddit.com
197
641
March 1, 2025please explain for and while loops and how they work like youre teaching a 5 year old
This has been submitted to the actual r/eli5 a few times: https://old.reddit.com/r/learnpython/comments/4nawyf/eli5_the_for_loop/ https://old.reddit.com/r/learnprogramming/comments/2gkn66/eli5_python_for_loops/ https://old.reddit.com/r/explainlikeimfive/comments/owxi3/eli5_or_16_for_and_while_loops_in_programming/ More on reddit.com
8
1
October 29, 2021Whats the difference between a while loop and a for loop?
Consider how the terms are used in common language: FOR For each day in July, I will practice writing loops. For every student in the class, provide a lunchtime meal. For each letter in the alphabet, write down a word beginning with that letter. For numbers in the range 1 to 10, calculate the square root. Notice that for each case, we iterate through multiple things (days in the month / students in the class / letters in the alphabet / numbers in a range). WHILE While there is still daylight, we can play football. While the music is playing, we will dance. While I am waiting, I will read a book. While my set of Pokémon cards is incomplete, I will keep collecting them. Notice that in each case, something is done for as long as a condition (a "predicate") is satisfied (is "True"). In these examples, the predicates are: "There is daylight?", "The music is playing?", "I am waiting?", "The set is incomplete?". As soon as the answer is "False", the loop stops. More on reddit.com
70
126
July 15, 2024Is for and while statement completely interchangeable in Python?
They are interchangeable but it would require more variables. The only place I can think of where while loops are better is when you have a counter than doesn’t increment every iteration. An example is if your removing every value in a list that is part of another list such as removing [a, b, c] from [a, g, f, t, b, d, c, v] but every time you .pop(), the lift becomes smaller by one so you don’t need to increment by 1 More on reddit.com
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July 12, 2021Videos
33. while-else in Python | Python PCEP Certification (PCEP ...
15:34
while Loop with else in Python - YouTube
07:44
#5: Python for..else & while...else | Python Best Practices - YouTube
04:15
Python Programming Tutorial: While Else - YouTube
04:57
5. How to Use While Loop with If Else Condition in Python | Python ...
00:59
Python Tips: How to use the "While Else" statement - YouTube
Reddit
reddit.com › r/learnpython › while loops can have an else statement!
r/learnpython on Reddit: While loops can have an else statement!
January 31, 2024 -
Maybe I'm the only one who didn't know this, but you can put an else statement after a while loop which will be used if the while loop is never entered. I found this out on the Leetcode problem of the day for today when I tried putting an else after my while loop, mostly expecting an error but typing because it's what I wanted the code to do, and it ran! The code I used is below. I know there are more optimal solutions, but I'm happy with what I learned today.
class Solution:
def dailyTemperatures(self, temperatures: List[int]) -> List[int]:
n = len(temperatures)
answers = [0] * n
stack = []
for i in range(n):
while len(stack) > 0 and temperatures[i] > stack[-1][1]:
answers[stack[-1][0]] = i - stack[-1][0]
stack.pop()
else:
stack.append([i, temperatures[i]])
if len(stack) == 0:
stack.append([i, temperatures[i]])
return answers
Top answer 1 of 4
12
You're almost right! The code under the else will be executed only when the while loop is not "broke out of". In the following code, if you change the variable guess to the value 10. The else clause will be executed. l = [4,5,6,7,8,9] count = 0 guess = 5 while count < len(l): if l[count] == guess: break count += 1 else: # if guess == 5 this will not be executed print("guess not found") print(count)
2 of 4
6
The else will run even if you enter the while loop, it just runs whenever the conditions of the while loop are not met.
GeeksforGeeks
geeksforgeeks.org › python › python-while-else
Python While Else - GeeksforGeeks
July 23, 2025 - In Python, the while loop is used for iteration. It executes a block of code repeatedly until the condition becomes false and when we add an "else" statement just after the while loop it becomes a "While-Else Loop".
Python documentation
docs.python.org › 3 › tutorial › controlflow.html
4. More Control Flow Tools — Python 3.14.6 documentation
In a for loop, the else clause is executed after the loop finishes its final iteration, that is, if no break occurred. In a while loop, it’s executed after the loop’s condition becomes false.
TOOLSQA
toolsqa.com › python › python-while-loop
Python While Loop | While True and While Else in Python || ToolsQA
August 6, 2021 - Do else statements get skipped? Or does "else" get executed? If there is a while loop in python with a break statement and an else statement, the else statement skips when the"break" executes.
Medium
allwin-raju.medium.com › understanding-the-while-else-loop-in-python-436c791649e8
Understanding the while-else Loop in Python | by Allwin Raju | Medium
November 12, 2024 - The else block in a while-else loop only executes if the while loop finishes without encountering a break statement. If a break statement terminates the loop early, Python skips the else block entirely.
Python Tutorial
pythontutorial.net › home › python basics › python while else
Python while...else Statement
March 31, 2025 - In Python, the while statement ... will execute as long as the condition is True. When the condition becomes False and the loop runs normally, the else clause will execute....
Reddit
reddit.com › r/python › til you can use else with a while loop
r/Python on Reddit: TIL you can use else with a while loop
March 1, 2025 -
Not sure why I’ve never heard about this, but apparently you can use else with a while loop. I’ve always used a separate flag variable
This will execute when the while condition is false but not if you break out of the loop early.
For example:
Using flag
nums = [1, 3, 5, 7, 9]
target = 4
found = False
i = 0
while i < len(nums):
if nums[i] == target:
found = True
print("Found:", target)
break
i += 1
if not found:
print("Not found")Using else
nums = [1, 3, 5, 7, 9]
target = 4
i = 0
while i < len(nums):
if nums[i] == target:
print("Found:", target)
break
i += 1
else:
print("Not found") Top answer 1 of 5
374
You can also use it with for!
2 of 5
107
Just... don't. It's kinda fun that you can do something like this but it's gonna be error prone and anyone reviewing the code would have to read the whole thing at least thrice to make sure they understand it. More verbose code can be better sometimes.
Real Python
realpython.com › python-while-loop
Python while Loops: Repeating Tasks Conditionally – Real Python
March 3, 2025 - Welcome!") break if attempts >= MAX_ATTEMPTS: print("Too many failed attempts.") break else: print(f"Incorrect password. {MAX_ATTEMPTS - attempts} attempts left.") This loop has two exit conditions. The first condition checks whether the password is correct. The second condition checks whether the user has reached the maximum number of attempts to provide a correct password. Both conditions include a break statement to finish the loop gracefully. ... You’ve learned a lot about Python’s while loop, which is a crucial control flow structure for iteration.
Codefinity
codefinity.com › courses › v2 › a8aeafab-f546-47e9-adb6-1d97b2927804 › 98dca52d-9dbe-41d0-9260-dd6a4c00f21e › d2099d74-36c9-4479-b70a-e3049bdcdfbe
Learn The else Statement in a while Loop | The while Loop
The else block executes when the loop terminates normally, meaning the loop condition becomes False without encountering a break statement. 1234567891011 travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Initialize ...
Medium
medium.com › @andrewdass › python-for-loops-while-loops-and-if-else-statements-2ecc134953ca
Python: For Loops, While Loops and If-Else Statements | by Andrew Dass | Medium
February 12, 2024 - index = 0 while index < 3: print(index) ... executed: ... An if-else statement goes through two conditions to see if the specified condition from the if statement is true, otherwise, the else statement will be printed....
Programiz
programiz.com › python-programming › while-loop
Python while Loop (With Examples)
counter = 0 while counter < 2: print('This is inside loop') counter = counter + 1 ... Here, on the third iteration, the counter becomes 2 which terminates the loop. It then executes the else block and prints This is inside else block.
Vaia
vaia.com › en-us › explanations › computer-science › computer-programming › python-while-else
Vaia | The #1 learning app for university & school
February 25, 2026 - Vaia is an intelligent learning app for students. Achieve your learning goals with more structure, motivation & efficiency. ⭐ Sign up now!
StudySmarter
studysmarter.co.uk › computer science › computer programming › python while else
Python While Else: Loop, True Else, Break | StudySmarter
In Python, the while else statement is a combination of a while loop with an else block. The while loop executes a block of code as long as its given condition remains true. Once the condition becomes false, the loop stops, and the else block is executed.
Towards Data Science
towardsdatascience.com › home › latest › python for-else and while-else clearly explained with 4 real-world examples
Python For-Else and While-Else Clearly Explained with 4 Real-World Examples | Towards Data Science
March 5, 2025 - Let us see how it works. ... The else clause will not be executed if the loop gets terminated by a break statement. If a loop does not hit a break statement, then the else clause will be executed once after the loop has completed all its iterations ...
Real Python
realpython.com › lessons › while-loop-else-clause
The While Loop Else Clause (Video) – Real Python
Join us and get access to thousands of tutorials and a community of expert Pythonistas. ... This lesson covers the while-loop-else-clause, which is unique to Python. The else-block is only executed if the while-loop is exhausted.
Published March 1, 2019
Scaler
scaler.com › home › topics › python › python for else
Python For Else - Scaler Topics
December 1, 2023 - In Python, 'for-else' and 'while-else' constructs provide a unique way to handle loops with an additional clause executed when the loop usually concludes without a break statement.
Tutorial Teacher
tutorialsteacher.com › python › python-else-loop
Python else Loop
x=0 while x<5: x=x+1 print ("iteration no {} in while loop".format(x)) else: print ("else block in loop") print ("Out of loop")
GeeksforGeeks
geeksforgeeks.org › python-else-loop
Python Else Loop | GeeksforGeeks
July 28, 2020 - Else with loop is used with both while and for loop. The else block is executed at the end of loop means when the given loop condition is false then the else block is executed.