pxt-calliope/olddocs/lessons/counter.md
Tom Ball f4eca66648 move lessons out of web site
will move select lessons back to "educators" section
2016-06-14 11:49:58 -04:00

1.4 KiB

counter lesson

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

Topic

Variables

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

input.compassHeading()
basic.forever(() => {})
let x = 0
if (true) {}
basic.showString("Hello!")
basic.showLeds(`
    . . . . .
    . . . . .
    . . # . .
    . . . . .
    . . . . .
    `)

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)