Python Fundamentals: Variables, Data Structures, and Control Flow
Variables and Data Types
Variables
A variable name must start with a letter or undercsore, and can only contain letters, digits, and underscores. For instance, message_1 is valid, but 1_message is not.
Variable names cannot contain spaces; use underscores to seperate words. greeting_message works, while greeting message causes an error.
Avoid ...
Posted on Thu, 07 May 2026 04:12:03 +0000 by voltrader