These are the keywords that are reserved by the language, i.e. they can't be used by any script defined identifiers. Remember that the host application may reserve additional keywords that are specific to that application.

and abstract* auto bool break case cast catch class const continue default do double else enum explicit* external* false final* float for from* funcdef function* get* if import in inout int interface int8 int16 int32 int64 is mixin namespace not null or out override* private property* protected return set* shared* super* switch this* true try typedef uint uint8 uint16 uint32 uint64 void while xor

* Not really a reserved keyword, but is recognized by the compiler as a built-in keyword.

These are the non-alphabetical tokens that are also used in the language syntax.

* ** / % + - <= < >= > ( ) == != ? : = += -= *= /= %= **= ++ -- & , { } ; | ^ ~ << >> >>> &= |= ^= <<= >>= >>>= . && || ! [ ] ^^ @ !is ::

Other than the above tokens there are also numerical, string, identifier, and comment tokens.

123456789
123.123e123
123.123e123f
0x1234FEDC
0d123987
0o1276
0b1010
'abc'
"abc"
"""heredoc"""
_Abc123
//
/*
*/

The characters space (32), tab (9), carriage return (13), line feed (10), and the UTF8 byte-order-mark (U+FEFF) are all recognized as whitespace.