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    VARIABLES

                     A program is a group of commands and instructions that tell the computer to carry out a

                     task. In scratch, a program is called a script. A script is made up of a number of blocks. So, the
                     blocks are the commands or instructions that we give to the sprite to perform a task.
                     All the numbers, text, date or pictures that we use in a program are called data. We store this

                     data in the computer memory so that we can get information from it later. This data is stored
                     in variables. It is called variable because it does not have a fixed value, its value changes. For
                     example, in the move block, the variable has a value 10 by default. You can modify this value
                     according to your script. Variables can store numbers as well as letters.

                     Creating Variables in Scratch

                     To create variables in Scratch, follow the given steps:

                     Click on For this sprite only if you want this variable to appear for the selected sprite only.
                     Here, we have added the variable fruit. It will be available for all the sprites.

                        2   Click on Make a                                   Type a variable
                            Variable block.                               3   name in the New
                                                                              variable name box.

                                                                                                          Click on
                                                                                                          the radio
                                                                                                          button of
                                                                                                          either of the   4
                                                                                                          options.

                      1   Click on Variables
                          block category.

                                                                             5
                                                                                 Click on Ok button.

                     The variable appears in the
                     list of  Variables blocks.
                     Observe  that  the  variable
                     name fruit  appears in  all

                     the blocks.

                       Now  create  the  following                                      Factbot
                     script:
                                                                                 Every time you type a name or number,
                                                                                 the previous value in the variable gets
                                                                                 deleted and the new value is stored.

                                                                                                     More on Scratch   113

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