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 Basics Syntax in Python

• The syntax are set rules that defines how Python program will be written so we have to go through the rules while writing Python code. 
• Python is actually best programming language for beginners. Its syntax is similar to English, which makes it easy to read and understand.
• Python has syntax that allows programmers to write programs with fewer lines than other programming languages 

Table of Content 

• Print() Function
• Identifiers
• Keywords
• Comments
• Indentation

Print()

• The print() function prints the given parameter value to the output screen.
• For example : print message to the screen

                          > Print("Hello World")

                Output : Hello World

     Here we write our first Python program

                

 Identifiers

• Identifiers is a name used to identify a variable, function class, module or other object 
• Python is a case sensitive language. 
• Case sensitive means it treats uppercase and lowercase characters differently 
• You must avoid same name while naming to identifiers.

• Rules for creating identifiers: 

         -  Starts with uppercase and lowercase alphabet or an underscore

         -  An identifiers cannot be start with digit or any type of special symbols like #,@,!,%,$ etc

         -  Keywords cannot be used as identifier. 

Keywords 

• Keywords are special reserved words that have specific meanings and purposes
• Almost all keywords are in lowercase 
• There are 33 keywords in python while creating this tutorial

---

                       False                  continue               from                not                 

                       def                      class                     global              or                 

                       True                    if                           pass                elif                       

                       and                     raise                     else                 in                  

                       as                       except                   is                     try                 

                       assert                 lambda                 while                for    

                       None                   del                       import              return

                       nonlocal              break                   finally               with

                       yield

---

Comments

• Comments are used to explain the Python code and to make it more readable.
• With the help of commenting we prevent execution when testing code.
• Once you comment the lines that cannot be executed with other code.

• There are two types of comments in Python programming as follows:

      1.  Single line Comments

      2.  Multiple line Comments

     1. Single line Comments 

•  Single line Comments begin with #.
•  Single line Comments comment only a inline code it cannot effect on next line.

           Example : 

                      > # This is comment now it cannot be executed

                      > print("Computer Tips & Tricks")

            Output : Computer Tips & Tricks   

      

      2. Multiple line Comments 

•  There are no built-in mechanism for multi-line comments in python.
•  To comment out multiple lines you can prepend each line with hash or you can comment using triple quotes 

         Example :

                      > " " " Multiple line comments are perform using triple 

                      > quotes like this " " "

                      > print("Computer Tips & Tricks")

            Output : Computer Tips & Tricks     

Indentation

• Indentation is used to indicate the level of nesting within code blocks it is a technique that provides readers sense of continuity
• Indentation matters! Don't use it casually. 

• Following code will report an error 'Unexpected indent'.

        Example :

                     > a = 20

                     > b = 45

• Additionally, Python uses indentation to define blocks code, such as loops and functions.
• For example, the code block within a for loop must be indented one level more than the for statement

        Example :

                     > for i in range(10):

                     >      print(i)

 print("Hello World !")