Use exact words
print works. pritn does not.
BEFORE PYTHON
What is a programming language?
A way to write exact instructions a computer can run.
THREE SIMPLE RULES
The details matter.
Put steps in order
In our first programs, Python starts at the top.
Keep the symbols
Quotes and parentheses have a job.
SAME JOB
Different languages. Same hello.
Each language has its own rules. We will start with Python.
print("Hello")
RESULTHello
console.log("Hello")
RESULTHello
Console.WriteLine("Hello");
RESULTHello
A PEEK AHEAD
Tiny ideas you will meet.
No need to learn them now. Just say hello.
name =
Variables
A box with a name remembers one thing.
if ?
Conditionals
A question helps code choose a path.
for ↻
Loops
Repeat a few steps without writing them again.
WHEN CODE NEEDS HELP
Errors are clues, not failures.
Every programmer meets them. We look calmly, one small clue at a time.
A bug
A tiny mistake makes the code do something unexpected.
Debugging
We read, test, and fix one small clue at a time.
Compiling
Some languages translate code before the computer runs it.
You do not need to fix these today. Just remember: a clue can help.
YOUR TURN
What did you learn?
Try each tiny question. A wrong answer becomes something to review.
0Completed
7Not tried
0Review
What is it?
What is a programming language?
Exact words
pritn("PyBot")What happens when Python reads this line?
Where to start
print("1")
print("2")
print("3")Which line does Python run first?
Keep the symbols
Which line keeps all its symbols?
Same hello
print("Hello")
console.log("Hello")One line is Python, one is JavaScript. What do they show?
What is a bug?
In code, what is a bug?
An error appears
Your code shows an error. What is a good next step?
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BIG IDEA
A language gives code its rules.
Next, we will learn the keys used to write those rules.