Hello World Program in Python

Output:

Hello, World!

Code Explanation

In the above code, we used the following elements:

• Comments (#): Lines starting with # are comments. They are used to explain the code and are ignored during execution.
• print() function: It is used to display output on the screen.
• "Hello, World!" (String): This is the text (string) that is passed to the print() function and gets displayed as output.

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!