What is Python and why it is used?

Python is a programming language, which is used for the development of scalable and robust applications, data analysis, and data visualization. It is mostly used in the domains of Artificial Intelligence(AI), Machine Learning(ML), and Data Science.

It supports a variety of programming paradigms, including structural, object-oriented, and functional programming. In addition, Python is used in many popular applications such as Instagram, Pinterest, and Spotify.

What can Python do?

Python is a general-purpose programming language. Hence, it can be used on a server for the creation of web applications by connecting to database systems. It means that it can also be used for reading, writing, and modifying files and used for developing software that is ready for production.

Python can solve complex problems in mathematics and can also manage big data. The versatile modules and extensive libraries of Python make it more productive and useful.

Why Python?

If we talk about the programming language, we prefer one which is easy to use and understand. Python is a high-level and efficient programming language that is easy to use and understand.

It has a large range of built-in libraries and a variety of functions that make the implementation very easy, and time-saving and the program length is less than in other languages.

The execution of python is quick and it works on different platforms including Windows, Linux, and Mac. For Python, there are powerful frameworks that are open-source and increase the speed of workflow.

There is a large global community for help and support and free learning resources are also available for both beginner and expert levels.

Python syntax according to other programming languages

The syntax of python is quite similar to the English language which ensures its readability. There is no concept of semicolons or line terminators etc like in other languages instead, it simply uses new lines as it is. There is no need to use parentheses for defining scopes, python relies on indentation for this purpose.

Comparison: C++ vs Java vs Python

Consider you want to print a line 'Hello, Welcome to AlgoIdeas!'.

C++ Code: main.cpp

using namespace std;

int main(){

	cout<< "Hello, Welcome to AlgoIdeas!";
	return 0;
  • Line#1: A header file library is included that is important for input and output in C++.
  • Line#2: It makes sure that we can use names for objects and variables from the standard library.
  • Line#3: Blank ( will be ignored) is just used for readability.
  • Line#4: int main() is a very important function in C++, the code written in its body (within curly braces'{ }') will be executed. Its body or scope starts from the opening curly braces that is ' { ' and ends at ' } ' the closing curly braces at Line#9.
  • Line#5: Again Blank.
  • Line#6: cout shows that we are going to output/print something, '<<' operator is used with cout. After this operator, we write what we want to print. For example, we used "Hello, Welcome to AlgoIdeas". The statement is ended with the semi-colon ';', which works as a terminator.
  • Line#7: Again Blank.
  • Line#8: return 0 is very important to end the int main() function.
  • Line#9: It shows that the scope of the function is ended here.

Java Code: HelloWorld.java

class HelloWorld {
	public static void main() {
		System.out.println("Hello, Welcome to AlgoIdeas!");
  • Line#1: Every program in Java uses a class in which the code has to be written. Here, HelloWorld is the name of the class. The scope of this class starts with opening curly braces '{' and ends with the closing curly braces '}' at Line#5.
  • Line#2: The code inside the main method will be executed. The scope of this main starts with opening curly braces '{' and ends with the closing curly braces '}' at Line#4.
  • Line#3: System.out.println is used to print something in Java. The string written after this in brackets () will be printed as output and the semi-colon ';' is used to end the code statement.
  • Line#4: Ending scope of the main method.
  • Line#5: End of the class HelloWorld.

Python Code: main.py

print("Hello, Welcome to AlgoIdeas!")
  • Line#01: A single-line code used in python for printing statements in which no library or terminator is included, just a print() is used.

Compilers for Python

  • The most common compilers used for Python are:
  • PyCharm
  • Spyder
  • Pydev
  • Idle
  • Wing
  • Rodeo

Frameworks for Python

Some of the most common Python frameworks are:

  • Django
  • Flask
  • Pyramid
  • Pycnic
  • Web2Py
  • CherryPy
  • Bottle
  • TurboGears

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