Embedded Files
Lesson Overview
Lesson Overview
Students are able to understand the use of variables in programming.
Students are able to learn how to program variables.
Did you know that tortoises have good memories?
Did you know that tortoises have good memories?
The tortoise can remember things for a long time.
The tortoise can remember things for a long time.
However, human memory is limited.
However, human memory is limited.
Hmm... how does a computer remember all the data given?
Hmm... how does a computer remember all the data given?
Variable
Variable
Variables are temporary storage spaces for numbers, text, and objects.
For example, scores in a game, number counters, and others.
An example of a “score” variable that stores and records score changes when the game is in progress.
Variables are like files in a computer. They can remember all the interactions of the internal system with the outside world.
Let's learn how to use variables in micro:bit.
Let's learn how to use variables in micro:bit.
Video 7: Tortoise (Part 1)
Video 7: Tortoise (Part 1)
Watch and follow this video to get to know how to use variables.
Watch and follow this video to get to know how to use variables.
Materials needed to follow this video:
micro:bit + USB wire
Computer
Visit makecode.microbit.org
Transcript
Hello world! Welcome back to the microbit series. I am Alina
and I will introduce my friend, sweet tortoise!
For this video, we will combine several skills that
we had learned from the previous videos.
We will use variable
in our programming. Variable
is a temporary storage space for number,
text and object. This value can be stored
for later usage. Prepare all the project materials
first: paper, cardboard, water bottle and microbit board.
Cut out the shape of tortoise from cardboard.
Use the plastic water bottle as the tortoise' shell.
Make a hole for the head of the tortoise.
This time, we want to program the microbit to
display how many times we have shaken the tortoise.
On the MakeCode software, declare the
variable in the drawer "Variables".
Click "Make a Variable" and give it a
suitable name for the variable. Type "count".
At "On start", insert the block "set count
to 0".
Click "Input",
and click "on shake".
Put in the block "change count by 1",
the programming will change the value of the variable "count"
every time microbit is shaken. To display
the "count", we use the forever block
and put in the block "show number".
Click "Variables" and select "count" to
be inserted inside the block "show number".
Connect microbit to the computer with a USB cable.
Press download on the software and save the programming file
into the microbit.
Observe what will happen when the microbit is shaken.
The "count" will change according to my shake.
The tortoise project is not done yet. For the next video,
we will add a servo motor to pop out
the tortoise's head when microbit is shaken. As for the challenge,
try to reset the value of variable "count"
to 0 when one of the buttons is pressed.
Happy trying!
and I will introduce my friend, sweet tortoise!
For this video, we will combine several skills that
we had learned from the previous videos.
We will use variable
in our programming. Variable
is a temporary storage space for number,
text and object. This value can be stored
for later usage. Prepare all the project materials
first: paper, cardboard, water bottle and microbit board.
Cut out the shape of tortoise from cardboard.
Use the plastic water bottle as the tortoise' shell.
Make a hole for the head of the tortoise.
This time, we want to program the microbit to
display how many times we have shaken the tortoise.
On the MakeCode software, declare the
variable in the drawer "Variables".
Click "Make a Variable" and give it a
suitable name for the variable. Type "count".
At "On start", insert the block "set count
to 0".
Click "Input",
and click "on shake".
Put in the block "change count by 1",
the programming will change the value of the variable "count"
every time microbit is shaken. To display
the "count", we use the forever block
and put in the block "show number".
Click "Variables" and select "count" to
be inserted inside the block "show number".
Connect microbit to the computer with a USB cable.
Press download on the software and save the programming file
into the microbit.
Observe what will happen when the microbit is shaken.
The "count" will change according to my shake.
The tortoise project is not done yet. For the next video,
we will add a servo motor to pop out
the tortoise's head when microbit is shaken. As for the challenge,
try to reset the value of variable "count"
to 0 when one of the buttons is pressed.
Happy trying!
Practice in the Video
Practice in the Video
Ways to build code.
End product.
After watching this video, it’s your turn to try the assignments and challenges! They are:
After watching this video, it’s your turn to try the assignments and challenges! They are:
Display the number of counts when the turtle is shaken.
Return the value of the count variable to 0 when one of the buttons is pressed.
👉CLICK HERE👈 to try it on makecode.
Read the lesson notes below to deepen your understanding.
Read the lesson notes below to deepen your understanding.
How to use Variables
How to use Variables
Click "Variables" > "Make a Variable" > Name your variable
Sample variable blocks.
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