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Aryan: Wow!!! That’s so interesting dear. Now we can make stories, dramas with
sounds also. In the above activity 3.1, you have changed the volume or pitch of the
sound of the sprite 4 times by writing the same code 4 times again and again. What
if I want to do it 50 times. Will I have to write it 50 times?

Gowri: No dear, there are blocks which can repeat the script written inside it any number of
times you want. Let’s learn it today.

3.3 LOOPING—“CONTROL” BLOCK

3.3.1 “Repeat 10…” block

This is also known as “c-block”, which is used to repeat the blocks of
instructions for some specific number of times.

3.3.2 “Repeat until…” block

This is also known as “c-block”, which is used to repeat the blocks
of instructions till some condition is false. If the condition becomes
true, then it runs the next instructions written after the “repeat”

block.
Aryan: What is this “c-block”? Please explain it.

Gowri: Sure dear! “c-block” means these blocks are in the shape of “c character”
of English alphabets. These blocks can have any number of statements written
inside it

Aryan: Ok, dear, now could you please explain me, what is the “condition”?

Gowri: Sure dear! Ok, please tell me the answers to some questions I am asking
to you.
1. Is 4+5=9?
2. Are you studying in class 4?
3. Are you going to school daily?

Aryan: “Yes”, is the answer of all these questions. But why are you asking these
questions to me?

Gowri: Yes, because all these questions are having some answers and based on
those answers, I will make decisions. So, all these questions will become conditions.
And answers to these questions are in the form of “yes” or “no” only. If I want to
make some decisions based on a question, then the question becomes condition.

Aryan: WOh! I come to understand now, what are the “conditions”? Thanks, dear
Gowri, for explaining this to me.

Gowri: Let’s learn “repeat until…” in detail with the help of an activity.

Scratch 35