Python Structure

Python Syntax

Variables are not pre-declared in Python.

Conditional operators like
       if condition:
              ... do something ...
       else:
              ... do some-other-thing ...
give different options for different conditions.
For instance:

if age > 18:
     print("You are grown-up now.")
else:
     print("You are still young.")



while loop:
       while condition:
              ... do something ...

and

for loop:
       for i in a_number:
              ... do something ...

The arithmetic operators do exactly what you would expect:
       + means add;
       - means subtract;
       * means multiply;
       / means divide; and
       % means moduli.

# is used for comments.
Comments are just remarks (explanations) you write along side your code for clarity purposes (help you define what you are doing); and also for future remembrance of what a piece of code was meant for.

The compiler neither needs nor processes them.