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documented function return type declaration #25718 #26195

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Feb 27, 2018
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documented function return type declaration #25718 #26195

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documented function return type declaration #25718
adrianisuru Feb 24, 2018
e41fa62
Update to more accurately describe return types
adrianisuru Feb 25, 2018
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12 changes: 12 additions & 0 deletions doc/src/manual/functions.md
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Expand Up @@ -125,6 +125,18 @@ There are three possible points of return from this function, returning the valu
expressions, depending on the values of `x` and `y`. The `return` on the last line could be omitted
since it is the last expression.

A return type can also be specified in the function declaration using the `::` operator. This converts
the return value to the specified type.

```jldoctest
function g(x,y)::Int8
return x * y
end
```

This function will always return an `Int8` regardless of the types of `x` and `y`.
See [Type Declarations](@ref) for more on return types.

## Operators Are Functions

In Julia, most operators are just functions with support for special syntax. (The exceptions are
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