Welcome: What Coding Is, and What You'll Make

Python for Absolute Beginners · Lesson 1

What you’ll learn

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Coding is writing instructions for a computer to follow — that is the whole idea
You write the instructions in a language the computer understands
The computer carries them out, one step at a time, exactly as written
A program is a finished set of instructions saved as a file
When you “run” a program, the computer follows it from top to bottom

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A recipe is a list of instructions for making food
Directions to a friend's house are instructions for getting somewhere
Coding is the same skill, aimed at a computer instead of a person
Except the computer is extremely literal: it does exactly what you wrote, not what you meant
So learning to code is mostly learning to be clear and precise

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Computers really only understand numbers, but nobody wants to write programs as numbers
A programming language is a simplified way of writing instructions
Python lets you write instructions in words that look a lot like plain English
Python turns those words into the numbers the computer needs
That is a simplified picture — Python translates your words into instructions the computer carries out, one step at a time

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It reads much like English, so you spend your energy on ideas, not strange symbols
You can get something working in minutes — your very first program is one line long
It is a real language used by professionals for websites, data work, games, and AI tools
What you learn here is not a toy version of coding — it is the real thing, taught from the beginning

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print("I am learning to code!")

Output:
I am learning to code!

print means “show this on the screen.” The words inside the quotes are the message. You will write your own version in Lesson 3.

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Write programs that print messages, do arithmetic, and remember values
Make decisions in a program (“if this, do that”) and repeat actions with loops
Store collections of things in lists and dictionaries
Draw shapes and pictures with code
Build a working number-guessing game from scratch — the course mini-project in Lesson 16

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Learn — a short explanation with code you can try yourself
Try it — a small hands-on exercise with an expected result, so you can check your own work
Quick quiz — five short questions with an answer key
Key takeaways — the ideas worth remembering
You need no experience at all to start: if you can type and use a computer, you are ready

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When something does not work, read the message the computer gives you
It is usually pointing at the exact problem
Errors are not failures — they are how every programmer finds out what to fix next
The only tool you need is Python itself, which you will install in the next lesson

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Think about what would happen if you changed the words inside the quotes in the one-line program to your own name — you will try it for real in Lesson 3

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Coding is writing instructions for a computer to follow, exactly as written
A program is a saved set of instructions; running it means the computer follows them from top to bottom
Python reads much like English and is a real professional language, not a toy
By the end of this course you will build a working number-guessing game
Errors are normal: read the message, find the problem, fix it, and move on

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Take the Lesson 1 quiz — 5 quick questions to check what you learned.

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What Is Python, and Installing It

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Press play on any slide and the lesson plays on by itself from there. You can still click Next or click a slide to move on.