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    Short key  To close IDLE window:              Subject: To exit IDLE window

                                                                               To exit  the  IDLE window, click  on
                                        Ctrl +
                                                    D
                                                                               File menu
                                                                                           Exit option.

                     SCRIPT MODE (EDITOR’S WINDOW)
                     Python Shell executes commands immediately and doesn't save them for later use. For multi-
                     line code and to save your work for future use, you should use Python script mode. This allows
                     you to write larger programs and run the same code multiple times. Save your code in a file, for
                     example, 'filename.py', and run it to see all the output after execution. To open Python Editor’s
                     Window: click on the File menu    click on the New File option.

                     The output is displayed in the Python Shell window.

                               INPUT AND OUTPUT

                     Python  provides  two  commonly  used  functions  input()  and  print()  for input  and  output
                     respectively.

                     THE input() FUNCTION
                     We use the input() function to take the user’s input while a program is being executed. (This
                     function also evaluates the expression whether the user has entered a string, number or list right
                     after receiving input.) The general syntax of the input() function is as follows:

                     Variable_name = input(<message to be displayed>)
                     Example:
                     >>> name = input("Enter your name: ")
                          Enter your name: Trackpad
                     By default, Python considers the input as string even if you entered a number as input. You cannot
                     perform calculations on string. To perform calculations, you need to convert the string into integer
                     or floating-point value.

                                                                                                 Introduction to Python  79

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