The Number isInteger() method
Find out all about the JavaScript isInteger() method of the Number object
Returns true if the passed value is an integer. Anything else, booleans, strings, objects, arrays, returns false:
Number.isInteger(1) //true
Number.isInteger(-237) //true
Number.isInteger(0) //true
Number.isInteger(0.2) //false
Number.isInteger('Flavio') //false
Number.isInteger(true) //false
Number.isInteger({}) //false
Number.isInteger([1, 2, 3]) //false
→ Get my JavaScript Beginner's Handbook
I wrote 19 books to help you become a better developer:
- HTML Handbook
- Next.js Pages Router Handbook
- Alpine.js Handbook
- HTMX Handbook
- TypeScript Handbook
- React Handbook
- SQL Handbook
- Git Cheat Sheet
- Laravel Handbook
- Express Handbook
- Swift Handbook
- Go Handbook
- PHP Handbook
- Python Handbook
- Linux Commands Handbook
- C Handbook
- JavaScript Handbook
- CSS Handbook
- Node.js Handbook