Python Variables

Python Variables: What are they?

This post aims to assist the reader with a detailed analysis of Python variables through examples.

Python Variables

Python variables are containers for storing values. The type of variables can be declared before using them. Once we assign a value to a variable, it becomes a variable. There is no static typing in Python.

Python Variable Creation

There is no command for declaring a variable in Python when we speak about variables. In the below example we have created a variable in Python. Execute

It is unnecessary to make variables of a specific type, and they can even switch types once they have been assigned. Execute

mr = 8 # mr is of type int ex = "Sally" # ex is now of type str print(ex)

Casting:

Casting in Python variables allows you to specify the data type of a variable.

a = str(3) # a will occur '3' b = int(3) # b will occur 3 c = float(3) # c will occur 3.0 print(a) print(b) print(c)

Determine the type

Using the type() function, you can determine a variable’s data type.

Execute

"Elon" print(type(a)) print(type(b))

Python Variable Types

In data types, data items are classified or categorized. In other words, it indicates what operations can be performed on a particular data set. A Python variable is an instance (object) of a class, since everything is an object in Python programming.

The following are Python’s standard data types: 1. Numeric. 2 Sequence Type.

The next section of this tutorial will go into more detail about data types and casting.

What is better, a single quote or a double quote?

Variables that are declared as strings can either be declared as single quotes or double quotes. Both are the preferred ways:

Example:

x = "Elon_Musk" # Or x = 'Elon_Musk' print (x)

Case Sensitive:

As far as Python is concerned, variable names are case-sensitive. This will create two variables:

#A has a value Sally and a has digit 4 – both are different variables. print( a ) print( A )

Python Output Variables

When outputting variables in Python, the print statement is often used.

Python uses the + character to combine text and variables: The + character can also be used to add variables to another variable in Python: The + character works as a mathematical operator for numbers: Execute Example 1 2 3 4 5 6 a = 3 b = 7 print(a + b) Python will give you an error message if you try to combine a string and a number: Execute Example 1 2 3 4 5 6 a = 3 b = "Elon" print(a + b)

Python variables should follow the following guidelines.

1. You must begin a variable name with a letter or an underscore.

2. There can be no number at the beginning of a variable name.

3. In variable names, alpha-numeric characters and underscores (A-z, 0-9, and _) are allowed.

4. elon_musk, Elon_Musk, and ELON_MUSK are three different variables (Python variables are case-sensitive).

5. A variable cannot be named using reserved words (keywords).