JS Practice — Built-in Objects

valueOf() — new Number(42).valueOf() === 42

📖 Usage Example

// Retrieve the primitive numeric value
const n = new Number(42)
n.valueOf()          // → 42
typeof n.valueOf()   // → 'number'

Use valueOf() on a Number object to extract the underlying primitive number value, which JavaScript also calls automatically in numeric expressions.

Number.prototype.valueOf()

numObj.valueOf() returns the primitive numeric value wrapped by a Number object.

new Number(42).valueOf()  // → 42

💡 Hints (1)