2.1.4.4 Variables - data-shaped boxes

Using variables

You're allowed to use as many variable declarations as you need to achieve your goal, like this:

var = 1 account_balance = 1000.0 client_name = 'John Doe' print(var, account_balance, client_name) print(var)

You're not allowed to use a variable which doesn't exist, though (in other words, a variable that was not given a value).

This example will cause an error:

var = 1 print(Var)

We've tried to use a variable named Var, which doesn't have any value (note: var and Var are different entities, and have nothing in common as far as Python's concerned).

REMEMBER

You can use the print() statement and combine text and variables using the +operator to output strings and variables, e.g.:

var = "3.7.1" print("Python version: " + var)

Can you guess the output of the snippet above?