Display Binary Numbers (using variables as an operator)

Learning outcomes

Students will be able to:

• Explain how sequence works in programming.
  Computer Science: Programming
• Outline how storing values in a variable is updated because of the code you have used.
  Computer Science: Programming

Requirement:

Write a program to display numbers 1, 2, 4, 8 and 16 on the screen one at a time. This is similar to the previous challenge, but instead of storing a number directly into the variable, you should double the value in the variable each time. You need to use an operator (for multiplying 2 numbers) for this challenge.

Testing examples:

The output will always show the numbers 1, 2, 4, 8 and 16 (there is no input).

Languages

Scratch

What it should look like

Click on the green flag to see the expected output of your program.

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Recommended blocks

Hints

• Make a variable called “number of dots” and change its value by using an operator (multiplying it by 2 before displaying it on the screen each time). You can find “make a new variable” under “data” script to create a new variable. Make sure your variable name is as descriptive as possible.
• Use the block to set the value of your new variable. Use the operation under “Operators” to double the value of your variable.
• Display the value of your variable on the screen by replacing “Hello” in your block with your new variable.

Show Scratch solution

Python

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Block-based

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