M1 solution

The expected, fully-commented artifacts for M1's lab. Peek only after you've tried the lab: the win is writing it yourself.

File	What it is
hello.py	Steps 2-8 in one place: print, comments, variables, the three types, an f-string.
greeter.py	The Step 9 build, fully commented line by line: input → convert to number → maths → personalized f-string output.

Run it

In Google Colab (today's way): open the file, copy its contents into a cell, press ▶ Run. When greeter.py asks questions, type your answers in the box that appears.

On your own computer (from M3 onward, once Python is installed):

python greeter.py

How this was verified

Both files were run with Python 3 before shipping. greeter.py was run with the answers Alex / 42.50 / 18 and produced:

Thanks, Alex! Here's your bill:
  Bill:  $42.50
  Tip:   $7.65  (18%)
  Total: $50.15

You wrote a real program, Alex. 

hello.py produced:

Hello, World!
Hi, I'm Ada. I'm 36. Learning Python: True.