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Update syntax.md (#1035)

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Add a note about floor division support.
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Arseny Kapoulkine 2023-09-06 18:14:03 -07:00 committed by GitHub
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@ -273,3 +273,9 @@ This restriction is made to prevent developers using other programming languages
Luau currently does not support backtick string literals as a type annotation, so `` type Foo = `Foo` `` is invalid.
Function calls with a backtick string literal without parenthesis is not supported, so `` print`hello` `` is invalid.
## Floor division (`//`)
Luau implements support for floor division operator (`//`) for numbers as well as support for `__idiv` metamethod. The syntax and semantics follow [Lua 5.3](https://www.lua.org/manual/5.3/manual.html#3.4.1).
For numbers, `a // b` is equal to `math.floor(a / b)`; when `b` is 0, `a // b` results in infinity or NaN as appropriate.