123, .123, 1.23, 1.23e2, 1.23e+2, "abc", true, false, null Scalar literals Unicode codepoint escape "\ud83d\ude03" Handle surrogate pairs \ud800-\udfff, should translate to codepoint. Control code and quote escape "\"\n\r\t\f\b\\\/" "abc \(123)" String interpolation {key: "value"} Object literal {key} {"key"} {$key} {(f): f} {("a","b"): (1,2), c: 2} Multiple key/value outputs {"\("abc")": 123} Key