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Python Variables

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In Python, a variable is a named reference to a value that is stored in memory. Variables are used to store data that can be manipulated and used in the program.

To create a variable in Python, you simply choose a name for the variable and assign it a value using the equals sign (=). For example:

x = 10

In this example, the variable x is assigned the value 10. The type of the variable is inferred based on the type of the value assigned to it.

Python variable names must follow certain rules:

  • Variable names must start with a letter or an underscore (_), and can contain letters, digits, and underscores.
  • Variable names are case-sensitive, so x and X are different variables.
  • Variable names should be descriptive and meaningful so that it’s clear what the variable is used for.

You can also assign the same value to multiple variables at once, like this:

x = y = z = 0

In this example, the variables x, y, and z are all assigned the value 0.

Python also allows you to assign multiple values to multiple variables at once using tuple unpacking. For example:

x, y, z = 1, 2, 3

In this example, the variable x is assigned the value 1, the variable y is assigned the value 2, and the variable z is assigned the value 3.

Variables can be used in expressions to manipulate and combine values. For example:

x = 10
y = 5
z = x + y

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