What are the local and global variables in the Python programming language?

What are the local and global variables in the Python programming language?

In this tutorial, we will cover the local and global variables of the Python programming language but before moving deep down the concept of Local and Global variables, first let’s discover.

• What is Python programming language?
• What is Variables in Python programming language?

What is Python programming language?

Python programming language is usually considered another important programming language similar to other languages such as Java, C, C++, etc.

Python programming is usually defined as the most powerful programming language and the general-purpose programming language, which is used to develop web applications, data science, the creation of software prototypes, and so on. It is considered a simple language for beginners because it has a simple syntax and easy language compared to the other programming languages.

Features of the Python Programming Language:

• Python programming language is the best programming language to handle the huge amount of raw and unstructured forms of data.
• Python programming language is easy to debug because it is an interpreted language, i.e., code is executed line by line.
• Python programming language is usually encapsulated with huge library support.
• Python is a cross-platform programming language that makes sense that the program of the python programming language can run on any platform.
• Python programming language is usually a multiprogramming language because it supports all conventional language features, including C and C++.
• Python programming language serves as the best programming language for developing applications effectively and efficiently. 

Variables in Python programming language

Variables are generally considered one of the most important terminologies used in any programming language. Variable is generally defined as the name assigned to a storage part (area) that the program usually uses to manipulate. A variable type is used to determine the size and the layouts for the memory of variables.

It also determined the values of the range that need to be stored inside the particular memory and the nature of the operations which can be applied to that variable.

In general, there are two types of variables present in the Python programming language that are as follows:

1. Local variables.
2. Global Variables

Local Variable in Python programming language:

Local variables are generally initialized inside a particular defined function or a block, and it is usually bounded to that particular function only, which means the local variable can be only and only be accessed inside the defined function. It cannot be used outside the defined function. The important key point related to the local variable is that the local variable exists until and unless the block of the particular function is under execution. As soon as the execution gets completed, the variable gets destroyed automatically.

A local variable can be declared with the help of the keyword that is “Local”.

Creation of Local Variable:

Generally, we can declare a variable inside a function for creating a local variable.

Example:

def harish():

x= “ My name is Mohammed Harish Askeen”

print (x)
harish ()

Output:

The output for the above respective code for creation of local variable is as follows:

If a programmer tries to use the above local variable outside the function then let us see with the example what happen.

Example:

def harish () :

x = “ My name is Mohammed Harish Askeen”

harish ()

print (x)

Output:

The outputs for the above respective code are as follows:

Global Variable in Python programming language:

The global variable is generally considered an important variable type in the Python programming language. Global variables are usually defined as the variable that is defined outside any block or the function, and that can be accessed throughout the program, which means inside and outside of every function.

A Global variable can be declared using the keyword “Global”. 

Defining and accessing of the Global variable:

Example:

# This function uses global variables.
x=” My name is Mohammed Harish Askeen”

   def askeen();

print(“ x inside:”,x)

askeen()

print(“ x outside:”,x)

Output:

The output for the above respective code is as follows:

Local Variable v/s Global Variable

Key differences between the Local variable and the Global variable:

The key differences between the Local variable and the Global variable are as follows:

1. If the Local variable is not initialized, then, in that case, a garbage value is stored. At the same time, in the Global variable, if it is not initialized, then in that particular case, zero is stored as default.
2. The local variable is created when the desired function starts the execution and is destroyed or lost when the functions get terminated. In the Global variable, it is created before the global program execution gets started and destroyed or lost when the desired program gets terminated.
3. In the Local variable, the data sharing is not possible because the data of the local variable can be accessed by only one function. In contrast, data sharing is possible with the Global variable as the multiple functions can access the same global variable.