Update variables.md

Improved the language and added more content

Author: ankush981

markdown-version/variables.md

@@ -1,28 +1,29 @@
 ### Variable in Python 
-In this section we are going to learn how to represent variables in python language
-It helps you store the data better so therefore we use the variable.
-* Variables can be reassigned at any time 
-* We can also assign variables together
+In this section we are going to learn how to represent variables in the Python language. Please note that variables in Python are dynamically typed, which means unlike languages like Java and C++, you don't need to specify whether the variable is a string, integer, etc.
+
+There are some basic conveniences Python variables provide:
+
+* Variables can be reassigned at any time
+* We can also assign variables together (more on this later)
 * We can also assign variables to each other
 
 ```Python
 x = 100
 y = 10
 all, us , about = 10, 11 ,12
-#In this case we have assigned variables at once
-print(x+y) #This will print 110
-print(us) # TO see if it is going to print the us variable that we declared
+# In this case we have assigned variables at once
+print(x+y) # This will print 110
+print(us) # To see if it is going to print the us variable that we declared
 ```
 #### Variable Naming Conventions
-* There are some naming variable conventions used in python language
-* You cannot start a variable with a number 
-* Lowercase and Uppercase does matter when naming the variables
-* Naming conventions are really import
-* Variables should be snake_case (This makes your code looks better its just a convetion)
-* Most variables are lowercase
-* Upper camelcase is usually used for the classes
-* Variables that start with dunder: double underscores **Dont Touch Them**
-* Variables should Contain valid data types
+
+There are some naming variable conventions used in python language: 
+
+* A variable name cannot start with a number. For instance, if you write something like `2morrow = 'day after'`, Python will complain loudly. 
+* Variable names are case-sensitive. `total` and `Total` are _not_ the same variable.
+* Variables should be snake_case (that is, small caps with words joined by underscores). Please note that this is just a convention in the Python community, as we believe this lends to clearer, easily readable code.
+* Camelcase is usually used for class names. For instance, `RssReader`.
+* There are some predefined variables in Python that start with dunder (double underscores), for example, `__dir__`. **Don't Touch Them. Ever.**
 
 ```Python
 2cats = 10 #This is wrong
@@ -34,4 +35,3 @@ cats != CATS
 
 __dont_touch__ #Dunder Variable
 ``` 
-