We have talked about Python programming language previously. You can find them in
Programming > Python section. Creating working environment for Python development and running our first python application is the first step to learning PYthon. In this tutorial we will look a
Hello World python application about how can we create and run?
Create Source Code File
We will follow simple steps to create a source code or application file. In this way we will do not need any IDE or other third party applications. We will create our
Hello Word application in a file named
helloworld.py . We use
py as extension to specify this . We will put following single line of code into
#!/usr/bin/python3 print("Hellow World")
We will check whether python interpreter is installed. There is two main version of Python and its interpreter. We will prefer the never one which is Python3 . The older one is Python2. We will list the version of python like below.
$ python -V
If we specify only
python command and
-V option we see that default python interpreter is Python2. We can explicitly specify Python3 with
python3 command like below.
$ python3 -V
Run Code With Python Interpreter
And we are here. We will run our source code file named
Python3 interpreter. We will issue them in command line like below.
$ python3 helloworld.py
Another way to run python file
helloworld.py is making it directly executable in bash. We will make it by using
chmod command like below.
$ chmod u+x helloworld.py
And we can run python file directly like below.