Number Methods

Published Aug 5, 2021Updated Oct 8, 2022

The Number object is used to represent numbers, like 3.14, -10, or 2022, and it comes with a handful of methods that’s useful for handling with numbers.

JavaScript treats primitive values as objects when it’s executing methods and properties.

Number Methods

.isFinite(): Determines whether the passed value is a finite number.
.isInteger(): Determines whether the passed value is an integer.
.isNaN(): Determines whether the passed value is NaN.
.parseFloat(): Converts a string to a floating-point number.
.parseInt(): Converts a string into an integer.
.toExponential(): Converts a number to a string of its exponential form.
.toFixed(): Converts a number to a string of its fixed-point decimal form.
.toLocaleString(): Converts a date to a string of its language-sensitive form.
.toPrecision(): Converts a number to a string of its specified precision form.
.toString(): Converts a number to a string.