Page 91 - Computer Genius Class 05
P. 91

Let's REFRESH


                       The  loc s in  cratch are in different shapes. They can  e di ided into six types o  shapes.
                        at  loc s always come at the top of a script as they start a script.
                      Stack blocks perform the main commands.
                       Boolean blocks are condition blocks which return the values “true” or “false” or the numbers
                      “0” or “1”
                        eporter  loc s can hold values, which consist of numbers or strings.
                       C blocks are loop blocks which check if a condition is true in the blocks within the loop.

                      The  loc s that end scripts are  no n as      loc s.
                       The sensing  loc s in  cratch sense the input  rom the  ey oard or the mouse at the time o
                      execution of a script.

                       n scratch  a program is called a  cript.
                        e store data in the computer memory so that  e can get in ormation  rom it later. This
                      data is stored in variables.

                       A variable that stores numbers is called a numeric variable.
                       A variable that stores letters in the form of strings or characters, is called string variable.
                        cratch has t o conditional  loc s      then ..  and    then .else  loc .
                       You can create games in Scratch by painting a new sprite and a new backdrop.





                                                       Exercise





                 A.  Tick ( ) the correct option.
                    1.  Which block always comes at the top of a script?

                         (i)  C block                                     (ii)  Boolean block

                         iii    at  loc                                  (iv)  None of these
                    2.  Which variable can be used and modified by all the sprites?

                         (i)  Global variable                             (ii)  Local variable
                        (iii)  Both (i) and (ii)                         (iv)  None of these

                    3.  C blocks are called                      blocks.

                         (i)  Wrap                                        (ii)  Big
                        (iii)  Cute                                      (iv)  Small

                     .   o  many types o   loc  shapes are there in  cratch

                         (i)  Five                                        (ii)  Six
                        (iii)  Seven                                     (iv)  None of these




                                                                           Advanced Blocks & Game Creation    89
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