pxt-calliope/docs/blocks/math/random-boolean.md

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# random Boolean
Returns a pseudo-random boolean value that is either `true` or `false`.
```sig
Math.randomBoolean()
```
## Returns
* a pseudo-random [boolean](types/boolean) that is either `true` or `false`.
## Example
Make your @boardname@ do a coin toss when it's dropped softly. Have the LEDs show 'heads' or 'tails' as the result of the toss.
```blocks
input.onGesture(Gesture.FreeFall, () => {
if (Math.randomBoolean()) {
basic.showIcon(IconNames.Happy)
} else {
basic.showIcon(IconNames.Sword)
}
})
```
## See Also
[random](/reference/math/random)