Question

133

how to declare an empty numeric (number) value in javaScript

rated 0 times [ 135] [ 2] / answers: 1 / hits: 15533 / 5 Years ago, sat, june 1, 2019, 12:00:00

I need to create an object with some non-defined values.
I know how to declare an empty string- in example that would be a object.name. But what would be an empty numeric value. What do I need to put instead of word 'number' in object.age property to tell the javaScript it can be any number?

let object = {

name : ''

age : number

}

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

jack

Add To Favorites

Follow

Total Points: 557

Total Questions: 96

Total Answers: 80

Location: Saint Helena

Member since Mon, Jan 16, 2023

1 Year ago

jack questions

1 How to make a request to an API route from `getStaticProps`

Sun, Jan 31, 21, 00:00, 3 Years ago

1 How to dynamically get column names from TypeORM?

Thu, Dec 10, 20, 00:00, 4 Years ago

1 Angular: Show Material Popup before Closing Browser Window

Sat, Aug 1, 20, 00:00, 4 Years ago

1 Alternative to Object.fromEntries?

Fri, Apr 17, 20, 00:00, 4 Years ago

1 How to confirm alert popup with puppeteer

Wed, Aug 14, 19, 00:00, 5 Years ago

View All

answered 5 Years ago dewayneh · Accepted Answer

You could take NaN, not a number as value, this values has a number type and not a usefull value.

let object = {

    name : '',

    age : NaN

};

If you not like to use NaN, you might use null or just undefined, but the first one is an object and the second is undefined as type.

And for checking if value equals to these defines:

NaN: isNaN(object.age)

null: object.age===null

undefined: typeof object.age===undefined