# toExponential method

The `toExponential` method converts a number to exponential notation. Optional parameter - the number of digits after the decimal point, if it is not present, then as many digits after the decimal point as necessary for representation will be displayed.

## Syntax

`number.toExponential([number of digits after the decimal point]);`

## Example

In this example, the exponential notation of the number `5` was output:

`let num = 5; console.log(num.toExponential());`

The code execution result:

`5e+0`

## Example

In this example, the exponential notation of the number `5` with `3` decimal places was output:

`let num = 5; console.log(num.toExponential(3));`

The code execution result:

`5.000e+0`
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