Variables and String Methods
Dive deeper into variable assignment and string methods.
We'll cover the following...
Variables
Now is a good time to learn about assigning variables. You can store anything as a variable to access it later. Variable assignment is performed using the = operator.
x = 4 + 5print(x)print(x + 5)
Variable names must not start with a number, must not contain spaces, and cannot be the same name as an existing keyword (names like with, open, in, True, False, and, or, import, from, continue, yield, try, except, finally, def, pass, is, round, max, abs, print, id, class, bool, int, float, list, str, dict, set, if, elif, else, and others). Basically, if any Python interface puts bold formatting around a variable name, you are using a Python keyword, and you should pick a different variable name. Python convention is to use all lowercase letters with underscores instead of spaces like_this. The use of CamelCase or camelCase is discouraged but not forbidden. Here are some valid and invalid variable names:
| Valid | Invalid |
|---|---|
x |
id |
list_of_values |
list |
range_of_something |
range of something |
Checking Variable Name Understanding
Is a great descriptive variable name a valid variable name?
Yes
No
If you want to print multiple things, you will have to pass them all to the print() ...