Let’s write our first program in Python and see the basics of how Python compiler interprets the code.
Write your first Python program
While other programming languages might have a comprehensive Hello World program, Python has a very simple one. You can use the print statement to simply write the statement.
This will give the below output:
Indentation in Python Programs
As you have noticed, there are no ending semi-colons or starting or ending curly brackets in Python. But then how does Python compiler identify blocks of code and starting and ending of a statement? The answer is indentation!
Indentation refers to the spaces at the beginning of a code line. You will get an error if you don’t add these spaces.
if (2 + 2 = 4): print(“Adding 2 to 2 gives four.”)
The number of spaces depends on you but there has to be one. The standard is to use even numbers minimum of two or a maximum of four spaces. You can simply use the tab to keep indentations of all blocks the same.
To put code explaining statements in Python called comments, ‘#’ character is used.
#This is a comment. print("Hello World!")
Statements in Python end with a new line typically but if your code line is running long and you want to divide it into two, you can use ‘/’ to do that which is called the line continuation character.
totalMarks = Maths + \ Physics + \ Chemistry
However, the statements contained within brackets do not need to use the line continuation character.
subjects = [Maths, Physics, Chemistry, Biology, Computer]
This is it for the basics. You will be learning about higher Python concepts in the coming articles.