The valueOf() Method in JavaScript

In JavaScript, the valueOf() method is used to retrieve the primitive value of a Number object. This method returns the underlying number value.

To demonstrate the usage of the valueOf() method, let’s consider an example:

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const age = new Number(36);
typeof age; // object
age.valueOf(); // 36

In the given example, we create a Number object called age with a value of 36. When we use the typeof operator on age, it returns “object” because age is an instance of the Number object.

However, by using the valueOf() method on age, we can retrieve the primitive value, which is 36 in this case.

It’s important to note that the valueOf() method is automatically called by JavaScript when a Number object needs to be converted to a primitive value, such as when using mathematical operations or when coercing the value to a string.

In conclusion, the valueOf() method provides a means to obtain the underlying number value from a Number object in JavaScript.

Tags: JavaScript, Number object, valueOf() method