python variables w3schools com

certainly! here's a comprehensive overview of python variables, similar to what you might find in a tutorial like w3schools, complete with code examples.

python variables tutorial

what is a variable?

a variable in python is a reserved memory location to store values. in simple terms, a variable is a name given to a memory location that allows you to store, modify, and retrieve data.

creating variables

in python, you can create a variable by simply assigning a value to a name using the `=` operator.

variable naming rules

1. variable names must start with a letter (a-z, a-z) or an underscore (_).
2. the rest of the variable name can contain letters, numbers (0-9), or underscores.
3. variable names are case-sensitive (e.g., `age` and `age` are different variables).
4. you cannot use python keywords and built-in function names as variable names.

**valid variable names:**

**invalid variable names:**

assigning values to variables

you can assign multiple values to multiple variables in one line:

you can also assign the same value to multiple variables:

data types of variables

python is a dynamically typed language, which means you don’t have to declare the variable type explicitly. the interpreter infers the type based on the assigned value.

you can check the type of a variable using the `type()` function:

reassigning variables

you can change the value of a variable at any time:

deleting variables

you can delete a variable using the `del` statement:

example code

here’s a complete example that brings together all the concepts discussed:

conclusion

in this tutorial, we covered the basics of python variables, including how to create them, assign values, understand data types, and manage variable scope. understanding variables is fundamental for programming in python, as they are essential for data manipulation and logic implementation.

you can continue exploring more advanced topics such as data structures, functions, and ...

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Python variables
W3Schools
variable assignment
data types
naming conventions
dynamic typing
scope of variables
global variables
local variables
constants
variable types
mutable variables
immutable variables
variable initialization
best practices