Control (Part 2)

-> Control blocks are what tell your robot what to do and when to do it by using "Loops"

-> A loop is like a magic spell that says, "Do this action again and again until I say stop!"

"Wait" block

"Wait Until" block

"Repeat" block

"Forever" block

"Repeat Until" block

"If-Then" block

"If-Else" block

"Stop and Exit program" block

"IF-THEN" block

If [something happens] Then [do something]

Notice that robot make 2 type of desicions.

If ["color sensor" reads green] Then [move FORWARD for 600 degrees at speed of 50%]

If ["color sensor" DON'T reads green] Then [move BACKWARD for 600 degrees at speed of 50%]

"IF-THEN x3" block

If [something happens]: robot detect something in its surrounding.

Then [do something]: the robot will decide what to do next.

Notice that robot make 4 type of desicions.

1- IF [no color] THEN [Not move (since there's no blocks outside the loop)]

2- IF[reads black] THEN[Move backward 500 degrees at the speed of 20].

3- IF[reads yellow] THEN[Make a pivot turn of 600 degrees at the speed of 20].

4- IF[reads white] THEN[Move forward 500 degrees at the speed of 20].

Notice that the order does not matter

Observation for If-then

This loop means: if [A] happened, then [Do A]. If [A] did NOT happened [skip this loop].
For "If-Then" block, you can add as many of this loop as you need
For example:
IF [the robot sees an obstacle in front of it] THEN [ it might make a turn to avoid it]

"If-Else" block

'If-Else' gives your robot a choice. If [Option A happens], do option A. Else, if [Option A not happen], Option B happens.

'If something happens, do this. But if something else happens, do that instead!'

If [read green] then [move FORWARD 600 degrees at speed of 50%].

Else [if NO green] then [ove BACKWARD 600 degrees at speed of 50%].

"Stop and Exit" block

STOP means telling your robot to take a break and EXIT means it's time for your robot to say goodbye to the program.

1- Robot [starts moving] backward at the speed of 50%.

2- It moves forever UNTIL the "color sensor" find red.

3- Robot stops moving.

4- Exit the program. The robot no longer listen to the code.

Notice that you don't have to press the "Stop" button on the screen. The robot turn off by itself.

Key-Takeaways: why are loops important for programming?

-> Save Time and Effort: Instead of telling the robot to do the same thing a hundred times, you can use a loop of "Repeat".
-> Get Things Done Faster: Robots are great at doing repetitive tasks quickly.
-> Allow the robot to make decisions: depending on its surroundings.
-> Avoid Mistakes: With loops, you can make sure the robot repeats a task exactly the same way every time, reducing the chances of errors.
-> Flexibility and Control: Loops give you control over how many times the robot repeats a task.

Time for a quiz!

Question goes here

Challenge for you

Hint:

-> The speed of moving backward is 30%

Use: Ultrasonic Sensor (in the sensor).

-> Add a "Stop and Exit" block

Notice that you need to add a spin turn in between the loops

You can either use [Repeat Until] OR [Wait Until]

Don's worry, we will learn the SENSORS next!