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What is a Variable?
In Python, a variable is a named location in memory that stores a piece of data. Think of it as a labelled box — you give the box a name, put something inside, and can retrieve or update that value at any point in your program.
Real-world analogy
Imagine a whiteboard in a classroom. A teacher writes
score = 0 at the top. As the quiz progresses, she erases 0 and writes the latest total. The label "score" stays fixed — only the value inside changes. That is exactly what a Python variable does.🏷️
Name
Every variable has a unique identifier (e.g. score, player_name, is_alive) that you choose when you create it.
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Value
The data stored inside — a number, text, True/False, or a more complex object.
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Mutable
Unlike a fixed constant, a variable's value can be updated as many times as needed while the program runs.
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No declaration needed
Python is dynamically typed. You don't need to say 'this is an integer' — Python figures it out automatically.
Key vocabulary
- Assignment — storing a value in a variable using the = operator.
- Data type — the kind of data stored (int, float, str, bool).
- Dynamic typing — Python infers the type automatically.
- Re-assignment — giving a variable a new value (can even change its type!).