Check if a number is an integer or a float in JavaScript

Опубликовано: 11 Июль 2026
на канале: A Better Way to Learn JS
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Welcome to our quick and insightful tutorial titled "Check if a Number is an Integer or a Float in JavaScript." This video is perfectly tailored for developers of all skill levels who seek a straightforward approach to differentiating between integer and floating-point numbers in their JavaScript applications. Whether you're validating user inputs, performing mathematical calculations, or simply enhancing your programming knowledge, this tutorial offers the simple code you need.

In just a few lines of JavaScript, we demonstrate an efficient way to identify whether a given number is an integer or a float. The key to this method is the use of the Number.isInteger() function, a built-in JavaScript function that determines if the value passed is an integer.

You'll also see another implementation, using the modulus operator, %.

With this operator, we can write simple reusable functions to complete the same task as we do with the Number.isInteger() function.