Python Variables

In Python, variables are used to store and manipulate data. They act as containers that hold a value, which can be of various types such as numbers, strings, lists, or even more complex objects. Here’s an example of how to declare and assign a value to a variable:

python

# Variable declaration and assignment
name = "John"
age = 25
height = 1.75
is_student = True

In the example above, we declared and assigned values to four variables: name, age, height, and is_student. The variable name stores a string, age stores an integer, height stores a floating-point number, and is_student stores a boolean value.

Python is dynamically typed, which means you don’t need to explicitly declare the type of a variable. The type is inferred based on the value assigned to it. This allows you to assign different types of values to the same variable. For example:

python

x = 5
print(x)  # Output: 5

x = "Hello"
print(x)  # Output: Hello

You can also assign the result of an expression or a function call to a variable:

python

a = 10
b = 5
sum_result = a + b
print(sum_result)  # Output: 15

name = input("Enter your name: ")
print("Hello,", name)  # Output: Hello, John (if the user enters John)

Variables can be updated by assigning a new value to them:

python

x = 5
print(x)  # Output: 5

x = 10
print(x)  # Output: 10

Variables can be used in expressions and statements to perform operations, comparisons, or any other desired computations.