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# guess the number lesson
Learn to create a random number with input from button A. #input #screen #math #docs
### @video td/videos/guess-the-number-0
## Topic
Math - Pick Random
## Quick links
* [activity ](/microbit/lessons/guess-the-number/activity )
* [challenges ](/microbit/lessons/guess-the-number/challenges )
## Prior learning/place of lesson in scheme of work
Learn how to create numbers randomly by using the input of the BBC micro:bit. We will be learning how to create random numbers with input using a local variable as well as simple commands, such as pick number and show number.
## Documentation
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```docs
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input.onButtonPressed(Button.A, () => {
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})
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let x = 0
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basic.showNumber(0)
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Math.random(3)
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basic.clearScreen()
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```
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## Objectives
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* learn how to run code when an input button is pressed
* learn how a variable is a place where you can store data
* learn how to set the value of a local variable
* learn how to returns a random number
* learn how to show a number on the LED screen, one digit at a time (scrolling left to right)
* learn how to turn off all the LED lights on the LED screen
