System Boot.

Welcome to the first Code Lab class. Today we are not writing “hello world” for its own sake — we are booting a small system that will grow with you: Health Engine.

In programming, almost everything starts with names. A variable is a labeled box: you put a value in it and later use it by name. In Python, text (a string) goes in quotes — "Health Engine". Numbers are written without quotes — 1.0. If you put quotes around 1.0, it is no longer a number but text, and later calculations will break.

Assignment is simple: name = value. The line system = "Health Engine" means: “store this text under the name system”. The line version = 1.0 does the same for a number.

Once a value is in a variable, we want to see it. The print() function writes to the console. print(system) does not print the word system — it prints the contents of the box. That difference between name and value is something you will use constantly.

Mini example (not the full solution):

name = "Lab"
print(name)

Common mistake: version = "1.0" instead of version = 1.0. The text looks “like a number”, but for Python it is a string.