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Has a value equal to the number of times you've visited the named passage. It's fairly useful - this can eliminate or greatly reduce the need to use “counter variables” to keep track of the player's actions. If the passage name is omitted, as in visited(), then its value is for the current passage.
If multiple strings are supplied to it, then it will return the value for the passage that was visited the least.
You've visited this passage <<print visited()>> times. You've visited the Pond <<print visited("Pond")>> times. /% Since visited() returns the value for the passage visited the least, then if the below result is greater than 0 (i.e. not false), then both passages must have been visited at least once. %/ <<if visited("Armoury", "Haberdasher")>>\ With your sword and hat, nothing can stop you! <<endif>>\
Advanced use: if you want to display something on every third time you visit a passage (no matter if you visit it 3 times, 10 times, or 100 times), then you can use the modulo operator
% to transform the number:
<<if visited() % 3 is 0>>\ "Every 3 visits to this passage, I walk the Earth again," croons Count Dracula. <<endif>>\
Feel free to modify the “3” to any number you wish, to make something happen on every four visits, every ten visits, etc.