Introduction to python

PYTHON BASICS


Interactive Mode Programming 
Using the interpreter without passing a script file as a parameter known as interactive mode programming. To start interactive mode start command prompt and type "python" without any arguments. Then you can see >>> symbol is indicating in command prompt. Interactive mode is useful for test a code instantly without saving it. For example 5*5 in python interactive mode will give response as 10 immediately. This a good feature for beginners to understand python syntax. 

Example: IDLE (Integrated Development Environment) is an integrated development environment for Python.

First Python Program

Writing Your First Python Program

 Create a folder called Python Programs on your C:/drive.
 In Notepad type the following program exactly as written:

print "Hello World!"

 Go to File and click on Save as.
 In the field Save in browse for the C: drive and then select the folder Python Programs.
 For the field File name type Hello.py.
 In the field Save as type select All Files
 Click on Save. You have just created your first Python program.

Running Your First Program

 Go to Start and click on Run.
 Type cmd in the Open field and click OK.
 A Command Prompt will appear. Type cd C:/and hit the key Enter.
 Type cd Python Programs and hit Enter. It should take you to the Python Programs folder.
 To run the program, type python Hello.py and hit Enter.
 You should see the Following output.