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64 lines
2.4 KiB
64 lines
2.4 KiB
2 years ago
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## Hello Python
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Here starts your journey in the marvelous world of Python, a very versatile programming language, popular for being accessible for beginner programmers and yet very powerful.
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### Setup
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First, you'll need to have Python installed on your machine. In those exercises we use Python 3.10, we then recommend you to install Python 3.10 or higher.
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- [Download and install Python](https://www.python.org/downloads/)
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To write your code, you may use your favorite IDE. If you don't have one, you can go for Visual Studio Code with Python extension pack installed:
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- [Get VS Code](https://code.visualstudio.com/)
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- (Optional) [The Python extension pack](https://marketplace.visualstudio.com/items?itemName=donjayamanne.python-extension-pack).
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> Setup may vary in base of your Operating System or machine specificities, if you feel stuck check on internet for the specific steps that suits your configuration.
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### Instructions
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Create a file `hello_python.py` and write inside a function `say_hello_python` that returns the string `"Hello Python!"`.
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```python
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def say_hello_python():
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# this is a function,
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# write your code here
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```
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### Usage
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Here is a possible code to test your function. Put it in another file (ex: `test.py`):
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```python
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from hello_python import say_hello_python
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print(say_hello_python())
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```
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Run your test file with the following command:
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```console
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$ python3 test.py
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Hello Python!
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$
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```
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> `test.py` file should be in the same directory of `hello_python.py` in order to work.
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### Hints
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- Python uses indentation to indicate in which block your code will run (many other languages uses parenthesis instead). It is then very important to indent your code properly.
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- `return` is a special world used to say which value a function should return (a function could also not return anything).
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For example `return 10` will return the number ten.
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- A string is a set of characters wrapped by `"`.
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For example `"Ciao bella"` is a string containing the worlds `Ciao Bella`.
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- In `test.py` we are calling another function named `print`. This function is already present in Python standard library so we don't have to create it. This function at its core is made to write strings in the standard output.
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### References
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- [Indentation in Python](https://www.w3schools.com/python/gloss_python_indentation.asp)
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- [Python print function](https://www.w3schools.com/python/ref_func_print.asp)
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