Page 88 - CG_v2.1_flipBooks_class_5
P. 88

We can also write this in two ways:
                     1. if                                               2.  if

                            mango is available                                mango is available
                       then                                                  then
                            make the mango shake                              make the mango shake
                                                                             else

                                                                              make cold coffee

                    In such situations, we use conditional blocks. Scratch has two conditional blocks. They are:
                  1.  If,then block: In this block if the condition is true, the blocks inside conditional block
                     will run. If the condition is false, the blocks inside conditional block will not run. Only the
                     blocks outside the conditional block will run.

                  2.  If,then,..else block: In this block if the condition is true, the blocks inside then condition
                     will run. If the condition is false, the blocks inside else condition will run.

                    You can also use the forever and repeat blocks with these blocks.
                  Let us make a small script.
                  Change the sprite to fish and change the backdrop to Underwater 2.

                  Drag the Event block, when green flag clicked to the script area. Drag the control block,
                  forever to the script area and put it to the green flag block. Drag the move block and put it
                  inside the forever block. Now, drag the if on edge, bounce block and put it inside the forever
                  block.

                  Now, put  the  control  block  if,then inside  the forever  block and  snap  the  sensing block,
                  touching color  in the hexagon of the if loop.





































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