===== Functions =====

When writing code in your stories, functions are special devices that can be used in [[expression|expressions]] in place of variables or values.

Syntactically, they consist of:
  * a name, which is subject to the same rules that [[variable]] names are under,
  * followed by a ''('' left bracket,
  * followed by zero or more other [[expression]]s separated by commas,
  * followed by a '')'' right bracket.

Technically speaking, any Javascript built-in function is available to the Twine author: ''parseInt()'', ''JSON.stringify()'', ''document.createElement()'' and all the rest are accessible, as are any functions that have been added by [[script]]s.