Python Variables

Creating a Python variable 

In python, there isn't a way to declare variables what you can do is you can create a variable and assign a value same time. 

name = "John"
x = 8

You can use an expression as an assigned value in a variable. In the below scenario, expression evaluate first then that value is assigned to the variable on the left-hand side.

value = 8 + 3
full_name = "John" + "Doe"

Previously assigned variables can be used to build up the expression

x = 6
y = 7
new_value = x + y

Here x and y variables need to create earlier before it assigned to the new_value variable.

You can also create multiple variables at once using a comma(,) In the below example x, and y variables are created at once and assigned x to the value 6 and y to the value of  7.

x, y = 6, 7

Nature of the python variables

If you create python variables by assigning the same values then those variables point to the same object location. see the below example.

country = "United Kingdom"
europe_country = "United Kingdom"

print("identity country ", id(country))  # gives the identity of the country variable
print("identity europe country ", id(europe_country))

output:

 identity country 140222437532528

 identity europe country 140222437532528

Python variables pointing to the same memory location

Data Types in Python

Unlike other languages like java, C#, and C, Python doesn't have primitive data types. it only has class-type data. you can check the data type of a variable using the type() function in python.

print(type(1))
print(type('name'))
print(type(True))
print(type(1.6))

output:

  <class 'int'>

  <class 'str'>

  <class 'bool'>

  <class 'float'>