生成一个视频，介绍下下面的markdown内容## Source Code
```
# This program prints Hello, world!
print('Hello, world!')
```
**Output**
```
Hello, world!
```
In this program, we have used the built-in [print()](/python-programming/methods/built-in/print "Python print()") function to print the string `Hello, world!` on our screen.
视频信息
答案文本
视频字幕
Welcome! Today we'll look at a simple Python program that prints Hello, world! to the screen. This is typically the first program people write when learning Python programming. Let's examine the code structure and understand how it works.
Now let's break down the code structure. The program consists of two main parts. First, we have a comment line that starts with a hash symbol, explaining what the program does. Comments are ignored by Python but help humans understand the code. Second, we have the actual print function call that outputs the text to the screen.
The print function is a built-in Python function that displays text on the screen. It has a simple syntax: print followed by parentheses containing the value to display. In our example, the text 'Hello, world!' is enclosed in single quotes, making it a string literal. The function name 'print' tells Python what action to perform, while the string literal is the data we want to output.
When we run this Python program, the interpreter executes each line from top to bottom. First, it encounters the comment line, which is completely ignored during execution. Then it reaches the print function call, which immediately outputs the text 'Hello, world!' to the terminal or console. This is exactly what we see in the output section.
In conclusion, this simple Hello World program demonstrates several fundamental programming concepts. We learned about comments for code documentation, built-in functions like print, string literals enclosed in quotes, and basic program execution flow. This program serves as the perfect starting point for anyone beginning their Python programming journey. From here, you can explore more complex programs and advanced Python features.