Python Variables: How to Define and Declare Variable Types in Python Best A Game-Changer for Aspiring Coders 2025

👉Python Variables : How to Declare, Use, and Manage Variable Types

👉What is a Variable in Python?

Python Variables : A Python variable is a reserved memory location that stores values. It acts as a reference point for data that the computer can process.

👉Python Variable Types

Python Variables : Python supports various data types like:

• Numbers
• List
• Tuple
• Strings
• Dictionary

Python variables can be declared using any name or alphabet combinations such as a, abc, x1, etc.

👉How to Declare and Use a Variable in Python

How to Declare and Use a Variable in Python

👉Example 1: Declaring a Variable

# Declare a variable

a = 100

print(a)

Output:

100

👉Re-declare a Variable

Python Variables : Python allows you to re-declare variables even after assigning them a value.

👉Example 2: Re-declaring a Variable

f = 0

print(f)  # Output: 0

f = ‘moji’

print(f)  # Output: moji

👉Python String Concatenation and Variables

Python Variables: Python requires explicit conversion of numbers to strings when concatenating with text.

👉Example 3: String Concatenation

a = “Software”

b =Moji

print(a + str(b))  # Output: moji

👉Python Variable Types: Local vs Global

Python variables can be either local or global.

👉Example 4: Global and Local Variables

# Global variable

global_var = 101

print(global_var)  # Output: 101

def someFunction():

    # Local variable

    local_var = ‘I am learning Python’

    print(local_var)  # Output: I am learning Python

someFunction()

print(global_var)  # Output: 101

👉Example 5: Changing Global Variables

f = 101

print(f)  # Output: 101

def someFunction():

    global f

    print(f)  # Output: 101

    f = “Changing global variable”

someFunction()

print(f)  # Output: Changing global variable

👉How to Delete a Variable in Python

You can delete a variable using the del command.

👉Example 6: Deleting a Variable

f = 11

print(f)  # Output: 11

del f

print(f)  # Error: variable not defined

👉Summary

• Variables in Python store data and are declared with simple names.
• Python allows variables to be re-declared.
• String concatenation requires explicit conversion of numbers to strings.
• Python supports local and global variables, with the global keyword enabling changes to global variables inside functions.
• Variables can be deleted using the del keyword.

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