Python Variables:

Before we dive deep into Python we need to learn basic concepts such as variables and data types supported by Python.

What is a Variable?

 Variables are nothing but a container that stores data in the memory(RAM). Python
is a case-sensitive language (i.e) lower case letter is not equal to Upper case letter,
eg: a is not equal to A.
There are certain rules involved in initializing a variable in Python:

• Variables must start with alphabets or underscore.

• Variable names must not contain any symbols.

• Variable names must not be a keyword.

In Python, we follow the camel case for naming the variable, for example, student_name.

Syntax:

variable_name = parameter

Example:

name = "Ram" # String
age = 23 #Integer
experience = 5.5 #float
print(f"Name:{name}\nAge:{age}\nExperience:{experience}")

Output:

Name:Ram
Age:23
Experience:5.5

Different types of data can be stored in a variable, Python supports the following data types:

1. Text Type: str
2. Numeric Types: int, float, complex
3. Sequence Types: list, tuple, range
4. Mapping Type: dict
5. Set Types: set, frozenset
6. Boolean Type: bool - true, false
7. Binary Types: bytes, byte array, memory view
8. None Type: NoneType

We will see some of the data types in upcoming posts.

type():

the type() function is used to find the data type of a variable.

Code:

x = "Hello World!"
print(type(x))

Output:

class 'str'

id():

the id() function is used to get the address of the variable stored in the memory.

Code:

x = "Hello World!"
print(id(x))

Output:

2683118043376