Python Interactive Mode

                                                              Python Interactive Mode 

      Python allows the user to work in an interactive mode .  It is a way of using the Python interpreter by executing Python commands from the command line with no script.

      This allows the user to type an expression,  and immediately the expression is executed and the result is printed. 

      To start an interactive mode. we will see that the Python command line window  appears as shown in Fig.1

Python 3.6 (32-bit)

                    Python 3.6.0  <v3.6.0:41df79263all,  Dec  23  2016, 07:18:10>  [MSC v. 1900 32 bit <Intel>] on win32

                    Type "help",    "copyright" ,   "credits"   or   "license"   for more  information.>>>-

                                                         Python Interactive Window 

              The ">>>" is the prompt  used in the Python interactive  mode which indicated that the prompt is waiting for the Python command and produces the output immediately. 

Example:

                                      >>>5+7

                                      12

                                       >>>print("Hello world |")

                                       Hello world |

 

                                       >>>num=10

                                       >>>num=num/2

                                       >>>print(num)

                                       5.0

           Working in the interactive mode is convenient for testing a single line code for instant execution.  But in the interactive mode,  we cannot save the statements for future use and we have to retype the statements  to run them again .