What is the difference between variables with names in programming?

In programming, variable names differ in several aspects:

• Scope: local variables are accessible only within a function or block, while global variables are accessible throughout the program.
• Data type: variables can store different data types (numbers, strings, objects, etc.).
• Naming style: in Python, snake_case is used for variables and functions, while CamelCase is used for classes.
• Mutability: variables can refer to mutable objects (e.g., lists) or immutable objects (e.g., strings).
• Conventions: for example, variables with a single underscore _var are considered internal, and with double underscores __var are for limited access (name mangling).

Example:

user_name = "Ivan"  # regular variable
_user_age = 30       # internal use
__password = "secret"  # limited access

Thus, variable names carry semantic meaning and affect code readability and structure.