Chapter 2: Variables ❎

Variables ❎

A variable is a named container for a value. Python has four basic kinds of value: strings, integers, floats and booleans.

A variable gives a name to a value so you can use it later. You create one with the assignment operator =: the name goes on the left and the value on the right.

The four basic data types

Type	Example	Used for
`str`	`"Bro"`	text
`int`	`25`	whole numbers
`float`	`10.99`	numbers with a decimal point
`bool`	`True`	yes/no values

python

first_name = "Bro"
age = 25
price = 10.99
is_student = True

print(f"Hello {first_name}")
print(f"You are {age} years old")

One variable of each type, then an f-string

The f before the opening quote makes an f-string. Inside it, anything in curly braces is replaced by the value of that variable, which is much easier to read than joining strings with +.

7:00–8:40Building f-strings with several variables

Key takeaways

Assign with = : name on the left, value on the right.
str, int, float and bool cover most everyday values.
f-strings insert variables into text with {curly braces}.

Variable: A name that refers to a value.
f-string: A string prefixed with f that substitutes {expressions} into the text.
Boolean: A True or False value.

Check your understanding

1. Which value is a float?
2. What does print(f"Hi {name}") do when name = "Ana"?