In this segment, we will explore how to create a basic Python program that outputs the traditional "Hello, World!" message to the console.
Python Hello World Program
Here's the "Hello, World!" program:
Example
# simple "Hello, World!" program in Python
# using the print() function to print the text "Hello, World!"
print("Hello, World!")
Output:
Hello, World!
Code Explanation
In the code snippet provided above, the print function, which is a native feature of Python, is utilized to present output to the user. The phrase "Hello, World!" represents a string literal. This is the content we aim to show, wrapped in double quotation marks. The print function receives this string as its argument and outputs it.
Things to Remember While Writing First Python Program
The following are few key concepts to remember while writing programs in Python:
- 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.
- 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.
- 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.
- 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.
- 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 illustration, we are creating a custom function that outputs Hello, World! from within its body.
Example
def show_message():
print("Hello, World!")
show_message()
Output:
Hello, World!
2. Using String Assignment and Print
In this instance, we initially assign the message to a string variable before proceeding to display it.
Example
msg = "Hello, World!"
print(msg)
Output:
Hello, World!
Conclusion
In this tutorial, we have explored the application of the print function to display a basic message: "Hello, World!". We have highlighted several important considerations to keep in mind when coding in Python. Additionally, we have examined further examples of Python that demonstrate the utilization of the print function.
Hello World Python Program - FAQs
1. Why is "Hello, World!" the first program?
Outputting "Hello, World" serves as a straightforward method to verify the proper functioning of Python. Additionally, it familiarizes users with the basic syntax of the language and aids newcomers in learning how to present output.
2. What does print do in Python?
The print function is a native function in Python that enables developers to present output on the display. For illustration, let us examine the following example:
Example
# using print() function to display output
print("Learning Python with us is fun!")
Output:
Learning Python with us is fun!
3. Do we need to install Python to run this program?
Indeed, Python must be installed on the system to execute this program. The installation can be verified by executing the following command in the command prompt or terminal:
Syntax:
$ python -version
For guidance on correctly installing Python, please consult our Python Installation guide.
4. How do we run Python script?
Step 1: To begin, we will save our Python script using the name "hello.py," where the .py extension indicates it is a Python file.
Step 2: Next, we will navigate to:
- Command Prompt (on Windows) or Terminal (on Linux/MacOS), and enter the subsequent command:
Syntax:
$ python hello.py
- Within an Integrated Development Environment (such as VS Code, Jupyter Notebook, Google Colab, or PyCharm):
Click "Run" or execute the script in the editor.