Give the either() function several string or number values, separated by commas, and it will pick one of them randomly. This allows a good degree of randomness to be inserted into the story, while still being fairly readable.
You can use either() with <<print>> to print a random message or phrase…
"I sentence you to be buried alive in <<print either("rhinoceros","buffalo","triceratops")>> <<print either("vomit", "sweat", "snot")>>!" the JudgeBot crackles noisily.
…or with <<display>> to display one of a set of passages.
You can also use either() with <<set>> to set variables to random values:
<<set $playerMoxie to either(2, 4, 6)>> <<set $playerAttire to either("green", "black", "rainbow")>> You have <<print $playerMoxie>> moxie points, and <<print $playerAttire>> armour.
And, in addition to macros, you can use either() with the link syntax to make a link that goes to a random passage:
You plunge into the [[glowing vortex|either("12000 BC","The Future","2AM Yesterday")]].