For loops provide a means to control the number of times your code performs a task. This can be a range, or iterating over items in an object. In this how to we will go through the steps to create your own projects using for loops.
for counter in range(10): print(counter) Copy Now let’s use a while loop to iterate over the letters in a word. The results will be similar to the above example. We’ll use an iterator and the next() function. If the iterator is exhausted, None will be returned instead of a lett...
Python Save as PDF If you buy through our links, we may earn an affiliate commission. Learn More.In this tutorial, we will go through everything you need to know for writing a while loop in Python. You will likely use while loops quite a bit, so it is a topic that I highly recom...
On the other hand, the code for the same for loop in Python is significantly easier to follow: for number in range(10): print(number) Copy Rather than directly outputting the loop variable, one element from a collection is usually used for indexing. Let’s look at another example from Ja...
We want to use the@retrydecorator to repeatedly attempt the generation until a valid number is produced. importrandomfromtenacityimportretry @retrydefgenerateRandomly(start,end):generateNum=random.randint(start,end)ifgenerateNum>20:print("Tried")raiseValueError("Number generated isn't within range")...
for-in: the usual way What if we need indexes? range of length enumerate What if we need to loop over multiple things? enumerate zip Looping cheat sheet In Summary Practice makes perfect For loops in other languages Before we look at Python’s loops, let’s take a look at a for loop...
While loop favors indefinite iteration, which means we don't specify how many times the loop will run in advance. In Python, a basic while loop looks like this: while [a condition is True]: [do something]Copy The condition we provide to the while statement is the controlling expression, ...
forninrange(0,3): print("%s is in the position %s"%(topList[n],n+1)) Output: The following output will appear after running the script. Using the continue statement: Thecontinuestatement does not terminate the loop like abreakstatement. It transfers the control of the program at the to...
You can also modify the while loop above to output all even numbers between 1 and 10: a =10 b =1 whileb <=10: b+=1 ifb%2==0: print(b) Note:If you don't want to run these examples with Python's built-in IDLE, you canuse Jupyter Notebookas well, but you need tocreate ...
Whether you're a Python beginner or you already have some experience with it, having a solid grasp of itsforloop is the key to solving array-related problems. Here, we take a look at how Python'sforloop works and some examples of how you can use it to solve coding challenges. How Fo...