bool

    // usages
    chance.bool()
    chance.bool({ likelihood: 30 })

Return a random boolean value (true or false).

chance.bool();
=> true

The default likelihood of success (returning true) is 50%. Can optionally specify the likelihood in percent:

chance.bool({likelihood: 30});
=> false

In this case only a 30% likelihood of true, and a 70% likelihood of false.