Counter lesson

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

Topic

Variables

Quick Links

• activity
• challenges
• quiz
• quiz answers

Prior learning and lesson level

Learn how to create a variable to keep track of the current count. We will be learning how to create a counter app using a variable and 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(`
    . . . . .
    . . . . .
    . . # . .
    . . . . .
    . . . . .
    `)

• variable:
• arithmetic operators
• on button pressed
• show number

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)