Returns a random [[type:bool]], either @true@ or @false.
Returns a random [[type:bool]], either @true@ or @false@.
The parameter is the probability of returning @true@, so @random_boolean(0.0)@ always returns @true@, @random_boolean(1.0)@ always returns @false@ and @random_boolean(0.5)@ simulates a fair coin toss.
Since the result is random, calling the function twice will give a different answer.
