JavaScript Number toExponential()

Convert a number into an exponential notation:

let num = 5.56789;
let n = num.toExponential();

Description

The toExponential() method converts a number into an exponential notation.

let num = 5.56789;
let n = num.toExponential(3);

number.toExponential(x)

Parameter	Description
x	Optional. An integer between 0 and 20 representing the number of digits in the notation after the decimal point. If omitted, it is set to as many digits as necessary to represent the value

A String, representing the number as an exponential notation.

toExponential() is an ECMAScript3 (ES3) feature.

ES3 (JavaScript 1999) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes