Review

Key Ideas

A name refers to a value.
Assignment updates what a name refers to.
Reassignment affects later lines, not earlier output.
Integers and floats are numeric values.
Strings store text.
Booleans are True and False.
None represents no meaningful value yet.
Expressions produce values.
Statements do work.
type() inspects what kind of value Python has.

Key Syntax

Syntax	Meaning
`score = 8`	assign a value to a name
`print(score)`	print the value referred to by `score`
`"hello"`	string value
`True`	boolean true
`False`	boolean false
`None`	intentional absence of a value
`2 ** 3`	power
`type(value)`	inspect the value's type

Common Mistakes

Mistake	Fix
Reading assignment as permanent equality	read assignment as an action
Using a name before assignment	assign the name first
Confusing `"8"` and `8`	inspect with `type()`
Using `^` for powers	use `**`
Writing `true` or `false`	use `True` and `False`
Expecting assignment to print	use `print()`

Checklist

You are ready to move on if you can:

predict the final value after reassignment
compute small arithmetic expressions
join strings intentionally
explain why "4" + "5" gives "45"
recognize booleans and None
separate the right-side expression from the whole assignment statement
use type() to debug a surprising value

If You Feel Lost

Return to this tiny program:

Then change "8" to 8 and rerun. Watch both the output and the type.