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6 SCRATCH

Your Aim

6.1 Blocks using keyboard and mouse 6.2.5 “hide variable…” block
6.1.1 “key… pressed?”— “Sensing” block 6.2.6 “my variable…” block
6.1.2 “mouse down?”— “Sensing” block 6.3 “if on edge, bounce” — “Motion” block
6.1.3 “when…key pressed” — “Events” block 6.4 Various Operations—
6.1.4 “when this sprite clicked”— “Events” “Operators” block
block 6.4.1 Arithmetic operators— “Operators”
6.2 Create variables and changing their block
values— “Variables” block 6.4.2 Relational operators
6.2.1 “Make a variable” button — “Operators” block
6.2.2 “set … to…” block 6.4.3 Logical operators
6.2.3 “change by” block — “Operators” block
6.2.4 “show variable…” block 6.4.4 More operators
— “Operators” block

Aryan: In the previous chapter, we learned how to create and destroy the
clone of a sprite when required. We also learned how to move the sprite to a
specific position and turn it in a particular direction. So, what are we going to
learn today?

Gowri: Sure dear. Today I will definitely tell you how to use the keyboard and
mouse clicks in our script.

Aryan: Oh, wow! With the keyboard, we will also learn mouse clicks in our
script. I am very much excited to learn it now!

Gowri: Before we start, please tell me how many arrow keys are available on
the keyboard.

Aryan: I know this dear. There are 4 arrow keys available on the keyboard.
Left arrow key (←), right arrow key (→), up arrow key (↑) and down arrow key
(↓). Is it right Gowri?

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