Page 41 - 2501_KVS_C-4

Gowri: Dear Aryan, there is one more way to write the same codes, using “if..then..else” block
with “forever“ block rather than “repeat until” block

Aryan: Please tell me dear how, I could write this code.

Gowri: Let’s learn it also dear. See fig. 3.11 and 3.12 to see another method to write the same
above code on First sprite (Fish) and code on second sprite (Fish2).

Fig. 3.11: Script on first sprite “Fish” Fig. 3.12: Script on second sprite “Fish2”

Aryan: Oh Yes! Same coding with two different methods. So, it means “if…then…else” block is
also used for conditions. Please tell me something about this.
Gowri: Yes, dear Aryan! This block is used to check conditions and to take decisions based on
that condition. This block has different options and their meanings. Let’s understand this now: -

3.5 IF BLOCK— “CONTROL” BLOCK

These blocks are also known as “c-block”.

3.5.1 “If condition? Then” block
This block, is used for asking the questions and returning the answer in true or

false. If the condition is true, then the blocks written inside this c-block will be
executed, otherwise not.

3.5.2 “If condition? Then…else” block

This block, is used for asking the questions and returning the answer in true or false.
If condition is true, then the blocks written inside this c-block will be executed,

otherwise the blocks written inside the “else” block will be executed.

3.6 “WAIT UNTIL…” BLOCK —“CONTROL” BLOCK
Like “if” block, condition is also written in this block and here it will wait till
the condition is false. When the condition becomes true, then the next block of

instructions will be executed. This is also known as “c-block”.

Scratch 39