JS Practice — Built-in Objects

valueOf() — Number valueOf

📖 Usage Example

// Retrieve the primitive value of an object
const n = new Number(42)
n.valueOf()   // → 42
const obj = { valueOf() { return 10 } }
obj + 5       // → 15

Use valueOf() to retrieve the underlying primitive value of an object; JavaScript calls it automatically in numeric contexts.

valueOf() — Number

Number objects have a valueOf() that returns the wrapped primitive number value.

Challenge: Verify that Number's valueOf returns a number primitive.

💡 Hints (1)

• Number.prototype.valueOf unwraps the wrapped number object to its primitive