Hello World Program in Python

In this section, we will learn how to write the simple program of Python to print the classic "Hello, World!" on the console.

Python Hello World Program

Here's the "Hello, World!" program:

Output:

Hello, World!

Code Explanation

In the above snippet of code, we have used print(), a built-in function in Python, to display output to the user. "Hello, World!" is a string literal. It's the text we want to display, enclosed within double quotes. The print() function takes this string as input and displays it.

Things to Remember While Writing First Python Program

The following are few key concepts to remember while writing programs in Python:

1. Indentation: Python uses indentation in order to define code blocks. Unlike other programming languages that make use of parentheses {} or keywords, Python uses proper indentation in the form of spaces or tabs for the code to function correctly. Moreover, it also improves the readability of the code.
2. Dynamic Typing: Python is dynamically typed language. This means that we are not required to declare the data types of variables explicitly. For example, x = 10 is an integer, but assigning x = "hello" later changes it to a string.
3. Virtual Environments: Python supports virtual environments (venv) which helps isolating the dependencies for different projects. This also helps preventing package conflicts and ensuring each project runs with the required library versions.
4. Extensive Library Support: Python offers a rich set of built-in libraries like math, itertools, datetime, collections, and functools, enabling efficient problem-solving without reinventing the wheel.
5. PEP 8: Python's official style guide promotes best practices such as meaningful variable names, consistent indentation, proper spacing, and a 79-character line limit for better code readability and maintainability.

Different Ways to Print "Hello, World!" in Python

1. Using a User-defined Function

In this example, we are defining our own function and printing Hello, World! from inside it.

Output:

Hello, World!

2. Using String Assignment and Print

In this example, we are first storing the message in a string variable and then printing it.

Output:

Hello, World!

Conclusion

In the following tutorial, we have learned the use of print() function to print a simple statement: "Hello, World!". We have discussed various key points to remember while writing programs in Python. We have also looked at some more examples of Python illustrating the use of print() function.