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| -rw-r--r-- | src/doc/reference.md | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/doc/reference.md b/src/doc/reference.md index e8ac474b07e..cfeb03b3fe1 100644 --- a/src/doc/reference.md +++ b/src/doc/reference.md @@ -900,9 +900,10 @@ fn main() {} ### Functions -A _function item_ defines a sequence of [statements](#statements) and an -optional final [expression](#expressions), along with a name and a set of -parameters. Functions are declared with the keyword `fn`. Functions declare a +A _function item_ defines a sequence of [statements](#statements) and a +final [expression](#expressions), along with a name and a set of +parameters. Other than a name, all these are optional. +Functions are declared with the keyword `fn`. Functions may declare a set of *input* [*variables*](#variables) as parameters, through which the caller passes arguments into the function, and the *output* [*type*](#types) of the value the function will return to its caller on completion. |