What is the purpose of ELSE clause for a loop explain how else works with while loop with examples?
The else clause of a loop (for/while) gets executed only if the loop has completed its execution fully without hitting a break statement (in other words, loop has completed normally). 2. The statements inside the loop’s else clause will get executed once after the loop has completed normally.
What is the need for having an ELSE clause for looping statements?
‘else’ Clause in ‘for’ Loop Loop statements may have an else clause. It is executed when the for loop terminates through exhaustion of the iterable — but not when the loop is terminated by a break statement.
How does for loop and while loop differ in python and when do you choose to use them?
for loops is used when you have definite itteration (the number of iterations is known). while loop is an indefinite itteration that is used when a loop repeats unkown number of times and end when some condition is met.
How do you use else and while in Python?
Introduction to Python while else statement In this syntax, the condition is checked at the beginning of each iteration. The code block inside 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.
What is for else and while else?
The for/else and while/else statements are not syntax errors in Python. They have the following meaning: The else branch executes if the loop terminates naturally because the loop condition isn’t met anymore. You may ask: isn’t this always the case?
What does the else statement written after loop executes?
When does the else statement written after loop executes? Explanation: Else statement after loop will be executed only when the loop condition becomes false. Explanation: There will be no output since there is no i in the string x.
Is for loop faster than while Python?
Using Pure Python In this case, the for loop is faster, but also more elegant compared to while. Please, have in mind that you can’t apply list comprehensions in all cases when you need loops. Some more complex situations require the ordinary for or even while loops.
Do While and while difference Python?
Do-While Loop There are two variations of the while loop – while and do-While. The difference between the two is that do-while runs at least once. A while loop might not even execute once if the condition is not met. However, do-while will run once, then check the condition for subsequent loops.
Can you use else with while loop?
While loop with else Same as with for loops, while loops can also have an optional else block. The else part is executed if the condition in the while loop evaluates to False . The while loop can be terminated with a break statement.
What does while loop mean in Python?
Python While Loop. The Python While Loop is used to repeat a block of statements for given number of times, until the given condition is False. While loop start with the condition, if the condition is True then statements inside the while loop will be executed.
How to construct while loops in Python?
While Loop In Python. A while statement iterates a block of code till the controlling expression evaluates to True.
How to use if else in Python?
IF Else Statement in python takes a Boolean Test Expression as an input,if this Boolean expression returns TRUE then code in IF body will get executed and if it
Does Python support DO WHILE LOOP?
The while and do while loops are generally available in different programming languages. Python also has while loop, however, do while loop is not available. As such, the difference between while and do while loop is the do while loop executes the statements inside it at least once; even the condition fails at first iteration.