AND Operator

AND operator is used to determining if two or more conditions are true. If all the conditions are true, the AND operator returns TRUE. If any one of the conditions fail, the AND operator returns FALSE.

In some programming languages AND operator is denoted by the “&&” symbol.

Real-Life Example

You should go to bed only after you have completed your homework and the time is past 8 PM.

Here, if we want to derive the logical operation from this scenario, we have the following conditions:

1. Condition 1: Have you completed homework?
2. Condition 2: Is the time past 8 PM?

And the decision we are deriving is: Decision: Should you go to bed?

Pseudocode

Based on this we can write the below pseudo-code:

IF (Homework completed) AND(Time is past 8 PM)
THEN
  Go to bed
ELSE
  Do not go to bed
END

Truth Table

Let us now try to see the different combinations possible with the above pseudo-code.

[table id=1 /]

AND Block in PictoBlox

The () and () Block is an Operators Block and a Boolean Block.

The block joins two boolean blocks so they both have to be true to return true. If they are both true, the block returns true; if only one is true or none are true, it returns false.

Activity: AND with Quarky

Let’s use this block with Quarky.

We are making a code that basically detects whether both the buttons of Quarky are pressed or not. If both buttons are pressed then the display of Quarky will show green, otherwise red.

Quarky Button Inputs

is button () pressed ? block from the Sensors palette provides the state of the selected.

If the button is pressed, then it shows True, and if the button is not pressed, then it shows False.

Lets Code

Follow the steps below to make the script:

1. Go to the Sensors palette and add a is button () pressed ? block into the scripting area. The button, L, is set as the default option.
2. Go to the Sensors palette and add a is button () pressed ? block into the scripting area. change the button to, R, is set as the default option.
3. Add () and () block, from operator palette. Inside the block add both the is button () pressed ? blocks.
   
4. Go to the Control palette and drop an if else block into the scripting area. Drop the () and () block in the white space of the if else block.
   
5. Go to the Display palette and drop the display matrix as () block inside the if branch and make all LEDs green. Repeat to add display matrix as () block inside the else branch and make all LEDs red.
   
6. Add a forever block around the entire script.
7. To add the finishing touch, add a when flag clicked block from the Events palette above the forever block.
8. Finally, click the green flag to run the script.

Assignment

Before you move on to the next lesson, a small assignment awaits you!

You must upload the PictoBlox program you created in this activity to the website. Submitting the assignment is a must in order to receive the certificate after completing the course.

Follow the steps below to upload your assignment:

1. Click on Browse.
2. Search and Select your saved Project file(.sb3) and Click Open.
3. Click on Upload to submit the assignment.

The file type allowed is the SB3 file generated from the PictoBlox program. The maximum file size allowed is 5 MB.

Good luck!