Python is one of the most popular programming languages today,...
Computer Science308 views·Updated 7 Sept 2026·3 pagesLearn Python Coding: Beginner's Guide
𝐚𝐧𝐨𝐮𝐬𝐡𝐡𝐡.⋆.𝜗𝜚. ✩@its_anoushka
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1
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Getting Started with Python Basics
Python makes coding feel less intimidating because it uses simple commands that make sense. The print() function displays text on screen - just put your message inside speech marks like print("Hello world!"). When you want to start a new line, use \n in the middle of your print statement.
Variables are like containers that store information for later use. A string is any collection of letters (like 'Hello world!'), whilst an integer is simply a number (like 7). When you want user input, use the input() function - just remember to add int() around it if you're expecting a number.
Syntax errors happen when you make mistakes in Python's 'grammar' - like forgetting brackets or speech marks. Don't worry though, everyone gets these! Python will tell you exactly what's wrong so you can fix it quickly.
Top Tip: Interactive mode lets you test code instantly, but script mode lets you save your work. Use script mode for anything you want to keep!
2
of 3
Mathematical Operations and Smart Decisions
Python handles maths exactly as you'd expect, with one sneaky difference. Addition (+), subtraction (-), and division (/) work normally, but multiplication uses the asterisk symbol (*) instead of ×. Always comment your code using the # symbol - this helps others (and future you!) understand what each bit does.
IF statements make your programs intelligent by letting them make decisions. You'll use comparison operators like == (equal to), != (not equal to), > (greater than), and < (less than) to create conditions. Remember that = assigns values to variables, whilst == checks if things are equal.
The magic happens when you combine elif (else if) and else statements. Your program can check multiple conditions in order, like giving different grades based on test scores. If the first condition fails, it tries the next one, and so on.
Quick Check: Can you spot why
if grade >= 80comes beforeif grade >= 70in a grading system?
3
of 3
Loops: Making Computers Do the Boring Stuff
Loops are absolute game-changers because they make computers repeat tasks automatically - this is called iteration. Instead of writing the same code twenty times, you write it once and let the loop handle the repetition.
For loops run a specific number of times using range(). Here's the tricky bit: loops always start counting from 0, and range(0,5) actually runs 5 times (0, 1, 2, 3, 4). The second number is always one more than the last number you want. Loop variables are traditionally called i, j, or k.
While loops are condition-controlled, meaning they keep going whilst something remains true. They use the same comparison operators as IF statements, but instead of doing something once, they repeat until the condition becomes false. This makes them perfect for things like password checkers or games that continue until someone wins.
Warning: Be careful with while loops - if your condition never becomes false, your program will run forever!
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Computer Science308 views·Updated 7 Sept 2026·3 pagesLearn Python Coding: Beginner's Guide
𝐚𝐧𝐨𝐮𝐬𝐡𝐡𝐡.⋆.𝜗𝜚. ✩@its_anoushka
Python is one of the most popular programming languages today, and it's brilliant for beginners because it reads almost like English! You'll learn the essential building blocks that every programmer needs to know, from displaying messages and storing information to...
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Getting Started with Python Basics
Python makes coding feel less intimidating because it uses simple commands that make sense. The print() function displays text on screen - just put your message inside speech marks like print("Hello world!"). When you want to start a new line, use \n in the middle of your print statement.
Variables are like containers that store information for later use. A string is any collection of letters (like 'Hello world!'), whilst an integer is simply a number (like 7). When you want user input, use the input() function - just remember to add int() around it if you're expecting a number.
Syntax errors happen when you make mistakes in Python's 'grammar' - like forgetting brackets or speech marks. Don't worry though, everyone gets these! Python will tell you exactly what's wrong so you can fix it quickly.
Top Tip: Interactive mode lets you test code instantly, but script mode lets you save your work. Use script mode for anything you want to keep!
2
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- Access to all documents
- Improve your grades
- Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Mathematical Operations and Smart Decisions
Python handles maths exactly as you'd expect, with one sneaky difference. Addition (+), subtraction (-), and division (/) work normally, but multiplication uses the asterisk symbol (*) instead of ×. Always comment your code using the # symbol - this helps others (and future you!) understand what each bit does.
IF statements make your programs intelligent by letting them make decisions. You'll use comparison operators like == (equal to), != (not equal to), > (greater than), and < (less than) to create conditions. Remember that = assigns values to variables, whilst == checks if things are equal.
The magic happens when you combine elif (else if) and else statements. Your program can check multiple conditions in order, like giving different grades based on test scores. If the first condition fails, it tries the next one, and so on.
Quick Check: Can you spot why
if grade >= 80comes beforeif grade >= 70in a grading system?
3
of 3Sign up to see the content. It's free!
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Loops: Making Computers Do the Boring Stuff
Loops are absolute game-changers because they make computers repeat tasks automatically - this is called iteration. Instead of writing the same code twenty times, you write it once and let the loop handle the repetition.
For loops run a specific number of times using range(). Here's the tricky bit: loops always start counting from 0, and range(0,5) actually runs 5 times (0, 1, 2, 3, 4). The second number is always one more than the last number you want. Loop variables are traditionally called i, j, or k.
While loops are condition-controlled, meaning they keep going whilst something remains true. They use the same comparison operators as IF statements, but instead of doing something once, they repeat until the condition becomes false. This makes them perfect for things like password checkers or games that continue until someone wins.
Warning: Be careful with while loops - if your condition never becomes false, your program will run forever!
We thought you’d never ask...
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
You can download the app from Google Play Store and Apple App Store.
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Concise revision notes for the GCSE OCR computer science specification (J277). Contains all the info needed for paper 2. Paper 1 is in my bio.
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(Apologies if some things look a bit off, converting the PowerPoint to PDF was a struggle as it wouldn’t let me include my custom drawings for diagrams)
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111544
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Comprehensive overview of algorithms for AQA GCSE Computer Science Paper 1, covering key concepts such as sorting (Bubble Sort, Merge Sort), searching (Linear and Binary Search), and essential programming principles like data types, pseudocode, and flowcharts. Ideal for exam preparation and understanding algorithm efficiency.
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Students love us, and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user