🚧unary plus (+)

🚧 under construction -> not not (!!)

JS ⟩ statement ⟩ expression ⟩ operator ⟩ arithmetic ⟩ unary ⟩ +

convert any value (except Symbol, BigInt) to Number.

// any -> number
+x

// except Symbol, BigInt
+Symbol()   // ⛔️ TypeError
+40n        // ⛔️ TypeError
// TypeError: Cannot convert a Symbol/BigInt value to a number

🌟 table of operators,

🧨 雷區

• cannot convert Symbol to Number❗️

• cannot convert BigInt to Number❗️

👥 相關

• type conversion

• double tilde (~~) - nearest integer towards zero.

• not not (!!) - convert any -> bool.

• uses punctuator plus (+).

📗 參考

• JavaScript: The Definitive Guide ⟩ 4.8.2 Unary Arithmetic Operators