Random bool

[Jason Gade]

math/rand and math/rand/V2 have functions that return various int and float types, but no function that returns a bool. While this would be very easy to implement on our own, I think it's an oversight for the packages.

rand.Bool() could represent a coin flip, which is a very common need in random value generation and modeling.

[M]

func (r *Rand) IntN(n int) int comes awfully close, with n=2.

[Randall O'Reilly]

Because Go does not automatically convert int to bool, having the bool return type is critical for simple conditional expressions. This is the version I use, giving a boolean with given probability:

func BoolP(p float64) bool {
return rand.Float64() < p
}

as in:

if BoolP(0.25) {
...
}

- Randy

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