JavaScript Number toExponential() method

definition and usage

toExponential() The method converts the number to exponential notation.

instance

Example 1

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

try it yourself

Example 2

Convert the number to exponential notation:

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

try it yourself

syntax

number.toExponential(digits)

parameter

parameter description
digits

Optional. An integer between 0 and 20, specifying the number of decimal places in exponential notation.

If omitted, it is set to the number of digits required to represent the value.

return value

type description
string represent the number in exponential notation.

technical details

return value

Returns the string representation of Number using exponential notation, where there is one digit before the decimal point and digits digit. The decimal part of the number will be rounded and, if necessary, padded with 0 to reach the specified length.

thrown

exception description
RangeError

when digits Exception thrown when too small or too large. Values between 0 and 20 do not trigger this exception.

Some implementations support a wider or narrower range of values.
TypeError Exception thrown when the object called this method is not Number.

browser support

Number.constructor เป็นคุณสมบัติของ ECMAScript3 (ES3)

ทุกบราวเซอร์สนับสนุน ES3 (JavaScript 1999)：

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