.toExponential()

Published Aug 23, 2021Updated Oct 8, 2022
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The .toExponential() method converts a number to a string of its exponential form.

Syntax

num.toExponential(digits);
  • digits (optional): The number of digits to keep after the decimal point.

Example

Converting number to a string:

const x = 420;
console.log(x.toExponential());
// Output: 4.2e+2

To verify if it is a string:

const x = 5;
console.log(typeof x.toExponential());
// Output: string

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