Python For Else Last Updated : 27 Jun, 2024 Comments Improve Suggest changes Like Article Like Report The for else loop in Python is a unique feature that adds flexibility to control flow. It allows you to distinguish between loops that complete naturally and those interrupted by a break. By understanding and utilizing this construct, you can write more expressive and intentional Python code.Understanding the For Else LoopThe for else loop in Python allows you to execute a block of code when the for loop completes its iteration normally (i.e., without encountering a break statement). The syntax is as follows:for item in sequence: # Code block for iterationelse: # Code block to execute if the loop didn't encounter a breakThe else block is executed only if the for loop finishes iterating over the sequence without being interrupted by a break statement.How for else WorksHere’s a basic example to illustrate the for-else loop:In this example, the loop iterates over all elements in the numbers list and then execute the else block because no break the statement was encountered. Python numbers = [1, 2, 3, 4, 5] for num in numbers: print(num) else: print("Loop completed without encountering a break.") Output12345Loop completed without encountering a break.Practical Use Cases of for elseThe for-else construct can be particularly useful in scenarios where you need to determine if a loop was exited prematurely (using break) or if it completed all iterations.Use Case 1: Searching for an ElementOne common use case is searching for an element in a sequence. If the element is found, you can break out of the loop; otherwise, the else block can handle the case where the element is not found. Python numbers = [10, 20, 30, 40, 50] target = 35 for num in numbers: if num == target: print(f"Found {target}") break else: print(f"{target} not found in the list.") Output35 not found in the list.Use Case 2: Checking for Prime NumbersAnother practical application is checking for prime numbers. You can use the for-else loop to verify if a number has any divisors other than 1 and itself.In this example, the loop checks for factors of number and breaks if any are found. If no factors are found, the else block confirms that the number is prime. Python number = 29 for i in range(2, number): if number % i == 0: print(f"{number} is not a prime number.") break else: print(f"{number} is a prime number.") Output29 is a prime number. Comment More infoAdvertise with us Next Article Python For Else S surajkr_gupta Follow Improve Article Tags : Python Python loop-programs Practice Tags : python Similar Reads Python Else Loop 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. So let's see the example of while loop and for loop with else below. Else with While loop Consider the below example. Pytho 3 min read Python if OR In Python, if statement is the conditional statement that allow us to run certain code only if a specific condition is true . By combining it with OR operator, we can check if any one of multiple conditions is true, giving us more control over our program.Example: This program check whether the no i 2 min read Python False Keyword False is a boolean value in Python that represents something untrue or a "no" condition. 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