pxt-calliope/docs/reference/js/lessons/guess-the-number/activity.md

# guess the number activity

guess the number with math random.

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### @video td/videos/guess-the-number-0

Welcome! This tutorial will help you create a guess the number game! Let's get started!

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Add an event handler when button `A` is pressed.

```
input.onButtonPressed(Button.A, () => {
})
```

Create a local variable of type number `x` and set it to a random number using `math->random`. `math->random(10)` generates a random number between `0` and `10` **excluded**.

```
input.onButtonPressed(Button.A, () => {
    let x = Math.random(10)
})
```

Show the random number on the screen.

```
input.onButtonPressed(Button.A, () => {
    let x1 = Math.random(10)
    basic.showNumber(x1, 150)
})
```

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Excellent, you're ready to continue with the [challenges](/lessons/guess-the-number/challenges)!

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