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pxt-calliope/docs/reference/js/lessons/counter.md
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counter lesson

Learn how to create a counter with with on button pressed.

@video td/videos/counter-0

Topic

Variables

Quick Links

Class

Year 7

Prior learning/place of lesson in scheme of work

Learn how to creating a variable to keep track of the current count. We will be learning how to create a counter app using a variable as well as simple commands, such as on button pressed, and show number.

Documentation

Objectives

  • learn how to create a variable as a place where you can store data so that you can use it later in your code, accessible across all functions, and in nested code blocks
  • learn how arithmetic operators operate on numbers and return a number
  • learn how to run code when an input button is pressed
  • learn how to show a number on the LED screen, one digit at a time (scrolling from left to right)

Progression Pathways / Computational Thinking Framework

Algorithms

  • Understands that iteration is the repetition of a process such as a loop. (AL)
  • Represents solutions using a structured notation. (AL) (AB)

Programming & Development

  • Creates programs that implement algorithms to achieve given goals. (AL)
  • Declares and assigns variables.(AB)

Data & Data Representation

  • Understands the difference between data and information. (AB)
  • Defines data types: real numbers and Boolean. (AB)

Information Technology

  • Collects, organises and presents data and information in digital content. (AB)
  • Makes appropriate improvements to solutions based on feedback received, and can comment on the success of the solution. (EV)

Computational Thinking Concept: AB = Abstraction; DE = Decomposition; AL = Algorithmic Thinking; EV = Evaluation; GE = Generalisation

Activity

Extended Activity

Homework