Python is a scripting language that runs using a python interpreter. The interpreter converts the program (python text file with “.py” extension) into hardware understandable format.
Let us see a simple hello world program using python language.
# helloworld.py # Below code prints 'Hello World!' string. print('Hello World!')
While we install the python program, it gives a set of executables in which one executable is “python” which generates an interpreter and makes it run on hardware. Below is how we use that executable.
$python Python 2.7.10 (default, Jul 15 2017, 17:16:57) [GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.31)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> print('Hello World!') Hello World!
Here in the above program, we are using a function called ‘print‘ and a string ‘Hello World!’.
‘print’ is an inbuilt function that prints the string argument. A string is a sequence of characters that are in between single quotes (”), double quotes(“”) or triple quotes(”””).
# Below code prints 'Hello World!' string as well. # String with triple quotes. strng = '''Hello World!''' print(strng)
A simple python program (Hello world example)
# helloworld.py # function to print 'Hello World!'. def greet(text): print(text) # calling function that prints given text greet("Hello World!")
We save the above code into a file named ‘helloworld.py’ (with .py extension) and run the code using the python executable as shown below.
# Output $python helloworld.py Hello World!
Hope this python hello world program helps you to start learning python. Happy Learning!.