What is toFixed() in Javascript?

toFixed() is a Number method that is used to format a number using fixed-point notation. toFixed() formats a number to a given length after the decimal point by rounding off to reduce the length or by adding zeros to increase the length.

Declaration

The `toFixed()` method is declared as follows:

num.toFixed(len)

• num: The number to be formatted using fixed-point notation.
• len: The number of digits after the decimal point in which num will be formatted. len is an optional parameter.

Note:

• If len is not passed as a parameter, the default len is len = 0. The number is rounded to a whole number.
• len must be in the range 1 to 100. Otherwise, RangeError is thrown.

Return value

The `toFixed()` method returns a string that represents the number `num` with `len` digits after the decimal point.

Browser compatibility

The toFixed() method is supported by the following browsers:

• Edge
• Firefox
• Google Chrome
• Opera
• Safari

Example

Consider the code snippet below, which demonstrates the use of the `toFixed()` method:

Explanation

A number `num` is initialized with `num = 15.199` in *line 1*. * *line 3*: The `toFixed()` method is not passed the input parameter, so `num` is simply converted to a whole number. * *line 5*: `len = 1` is passed to the `toFixed()` method, so the digits after the first decimal place are rounded off. * *line 7*: `len = 7` is passed to the `toFixed()` method, so 4 zeros are added to make 7 decimal places.