This is the first step in learning any programming language. Let’s write our first Python program to print “Hello World” on the console.
Python Hello World Program
Here is the python script to print “Hello World” on the console.
print("Hello World")
Yes, that’s it. It could not have been more simpler than this.
Here is the output when this script is executed from the PyCharm IDE.
It’s the most simple program we will ever write. Let’s execute it from python command line interpreter too.
$ cat hello_world.py
print("Hello World")
$ python3.7 hello_world.py
Hello World
$
Printing “Hello World” from Python Command Line Interpreter
Python comes with interpreter, which is a shell like interface to run python scripts. Let’s see how to print “Hello World” message to console from python interpreter.
$ python3.7
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 16:52:21)
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> print("Hello World")
Hello World
>>>
Understanding Python Hello World Program
- The print() function is one of the built-in function. This function prints the argument to the console.
- We are calling print() function with string argument “Hello World” so that it would get printed on console.
- When we are executing python script file, statements get executed one by one. The print() statement gets executed printing the “Hello World” message on to the console.
Summary
We started our journey to learn Python programming with conventional “Hello World” program. We learned that the program can be executed from the PyCharm IDE and terminal. We also got some idea about python interpreter tool, which is very useful in running small python code snippets.