Read our blogs, tips and tutorials
Try our exercises or test your skills
Watch our tutorial videos or shorts
Take a self-paced course
Read our recent newsletters
License our courseware
Book expert consultancy
Buy our publications
Get help in using our site
548 attributed reviews in the last 3 years
Refreshingly small course sizes
Outstandingly good courseware
Whizzy online classrooms
Wise Owl trainers only (no freelancers)
Almost no cancellations
We have genuine integrity
We invoice after training
Review 30+ years of Wise Owl
View our top 100 clients
Search our website
We also send out useful tips in a monthly email newsletter ...
Posted by Andy Brown on 05 September 2021
This video explains how to create loops which execute while a particular condition is true (and how to break out of these loops), how to print messages more neatly and how to use ranges to loop over sequences of numbers.
See our full range of Python training resources, or test your knowledge of Python with one of our Python skills assessment tests.
This video has the following accompanying files:
File name | Type | Description |
---|---|---|
List even squares.py | Python code | Using a while loop to list out the first N even squares |
Fizz buzz.py | Python code | Listing out the first N numbers divisible by 3 |
Greet pets.py | Python code | Using variables when printing to greet cats by name |
List math terms.py | Python code | Listing out cubes and reciprocals nicely formatted |
Range syntax.py | Python code | Syntax of range with one to three arguments |
Range example.py | Python code | Using range to list out the first N cubes |
Prime numbers.py | Python code | Nested ranges listing out prime numbers |
Click to download a zipped copy of the above files.
After watching this video, you may like to test your understanding by doing one or more of the following exercises:
You can also download the answers to each exercise from the links above.
You can increase the size of your video to make it fill the screen like this:
Play your video (the icons shown won't appear until you do), then click on the full screen icon which appears as shown above.
When you've finished viewing a video in full screen mode, just press the Esc key to return to normal view.
To improve the quality of a video, first click on the Settings icon:
Make sure yoiu're playing your video so that the icons shown above appear, then click on this gear icon.
Choose to change the video quality:
Click as above to change your video quality.
The higher the number you choose, the better will be your video quality (but the slower the connection speed):
Don't choose the HD option shown unless your connection speed is fast enough to support it!
Is your Wise Owl speaking too slowly (or too quickly)? You can also use the Settings menu above to change your playback speed.
From: | Surendra7 |
When: | 19 Dec 21 at 16:00 |
Does changing the range for prime test to
for possible_prime in range(2,int(test_number/2)):
will make code more effiecient.
From: | Andy B |
When: | 20 Dec 21 at 09:27 |
The algorithm given is to teach Python, and doesn't claim to be efficient. A simple improvement would be to test from 2 up to the square root of the possible prime, rather than half of it, on the grounds that two factors of a prime can't both be greater than its square root, otherwise when you multiplied them together you'd get a number greater than the prime. There are many better tests for primeness than this, though.
Kingsmoor House
Railway Street
GLOSSOP
SK13 2AA
Landmark Offices
99 Bishopsgate
LONDON
EC2M 3XD
Holiday Inn
25 Aytoun Street
MANCHESTER
M1 3AE
© Wise Owl Business Solutions Ltd 2024. All Rights Reserved.