Elective course

Course recommendation:

Definition and usage JavaScript Number toFixed() Method

Definition and usage Method converts a number to a string.

toFixed()This method rounds the string to the specified number of decimal places.

Note:

If the number of decimal places is higher than the number, add zeros.

let num = 5.56789;
Instance

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Example 1

let num = 5.56789;
Example 2

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Example 3

Rounded to 10 decimal places:

let num = 5.56789;
let n = num.toFixed(10);

Try it yourself

Syntax

number.toFixed(digits)

Parameter

Parameter Description
digits

Optional. Number of decimal places. Values between 0 and 20, including 0 and 20.

Default is 0 (no decimals).

Returns value

Type Description
String Representation of a number with (or without) decimals.

Technical details

Returns value

Returns number string representation, not in exponential notation, with a fixed number of decimal places after the decimal point. digits digit places.

If necessary, the number will be rounded and can also be padded with zeros to reach the specified length.

If digits If the number is greater than le+21, this method will only call number.toString() returns a string represented in exponential notation.

thrown

Exception Description
RangeError

When digits An exception is thrown when it is too small or too large.

Values between 0 and 20 will not trigger this exception. Some implementations may support a wider or narrower range of values.
TypeError An exception is thrown if the object called this method is not a Number.

Browser support

Number.constructor It is a feature of ECMAScript3 (ES3).

All browsers fully support ES3 (JavaScript 1999):

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