How to declare a variable in Python?

In Python, you can declare a variable by assigning a value to it using the assignment operator (=). Here's the general syntax for declaring a variable:

variable_name = value

Here's an example that declares and assigns a value to a variable:

name = "John"

In the above example, the variable name is declared and assigned the value "John". Python automatically determines the type of the variable based on the value assigned to it.

Here are a few things to keep in mind while declaring variables in Python:

  • Variable names must start with a letter or underscore (_) and can contain letters, numbers, or underscores.
  • Variable names are case-sensitive, so name and Name are considered different variables.
  • Avoid using reserved keywords as variable names, such as print, for, while, etc.
  • It's good practice to use descriptive names for variables to improve code readability.
  • Variables can be declared and assigned in a single line, or you can declare multiple variables in a single line by separating them with commas.
  • Variables can be reassigned with a new value at any point in the code.

Here are a few examples of variable declarations in Python:

# Declaring and assigning a string variable
name = "John"

# Declaring and assigning an integer variable
age = 25

# Declaring and assigning multiple variables
x, y, z = 1, 2, 3

# Assigning a new value to an existing variable
age = 30

It's important to note that Python is dynamically typed, which means you don't need to explicitly declare the type of a variable. The type of the variable is inferred based on the value assigned to it.

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