How to use Regular Expressions In Javascript
This approach involves converting the number to a string and using a Regular Expression to check if it contains a decimal point. If it does, it’s a float; otherwise, it’s an integer.
Syntax
/\d+\.\d+/.test(numberString);
Javascript
const inputNumber = 123.456;const numberString = inputNumber.toString();const isFloat = /\d+\.\d+/.test( numberString);console.log( `Is ${inputNumber} a float? ${isFloat}`); |
Output
Is 123.456 a float? true
JavaScript Program to Check if a Number is Float or Integer
In this article, we will see how to check whether a number is a float or an integer in JavaScript. A float is a number with a decimal point, while an integer is a whole number or a natural number without having a decimal point.
Table of Content
- Using the Number.isInteger() Method
- Using the Modulus Operator (%)
- Using Regular Expressions
We will explore every approach to Check if a Number is a Float or Integer, along with understanding their basic implementations.