OR Operator

The OR operator is used to determine if either one of two or more conditions is TRUE. If any of the condition is true, the OR operator returns TRUE. If all the conditions fail, the OR operator simply returns FALSE.

In some programming languages OR operator is denoted by “||” symbol.

Real-Life Example

We should carry an umbrella when either it is sunny, or it is raining. Otherwise, we should not carry it.

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

1. Condition 1: Is it sunny outside?
2. Condition 2: Is it raining outside?

And the decision we are deriving is: Decision: Should we carry an umbrella?

Pseudocode

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

IF (It is sunny outside) OR (It is raining outside)
THEN
  Carry an umbrella
ELSE
  Do not carry an umbrella
END

Truth Table

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

[table id=2 /]

OR Block in PictoBlox

The () or () (logical OR) block is an Operators block and a Boolean block. The block joins two Boolean blocks and compares them. If at least one of them is true, the block returns true; if neither of them is true, only then does the block return false. This block is used for checking if any of the conditions are true.

Activity: OR with Quarky

Let’s use this block with Quarky.

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

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!