What is the use of tofixed 2 in javascript?

The toFixed() method formats a number using fixed-point notation.

Try it

Syntax

toFixed()
toFixed(digits)

Parameters

digits Optional

The number of digits to appear after the decimal point; this may be a value between 0 and 20, inclusive, and implementations may optionally support a larger range of values. If this argument is omitted, it is treated as 0.

Return value

A string representing the given number using fixed-point notation.

Exceptions

RangeError

If digits is too small or too large. Values between 0 and 100, inclusive, will not cause a RangeError. Implementations are allowed to support larger and smaller values as chosen.

TypeError

If this method is invoked on an object that is not a Number.

Description

toFixed() returns a string representation of numObj that does not use exponential notation and has exactly digits digits after the decimal place. The number is rounded if necessary, and the fractional part is padded with zeros if necessary so that it has the specified length. If the absolute value of numObj is greater or equal to 1e+21, this method calls Number.prototype.toString() and returns a string in exponential notation.

Warning: Floating point numbers cannot represent all decimals precisely in binary. This can lead to unexpected results, such as 0.1 + 0.2 === 0.3 returning false .

Examples

Using toFixed

const numObj = 12345.6789;

numObj.toFixed()       // Returns '12346': rounding, no fractional part
numObj.toFixed(1)      // Returns '12345.7': it rounds up
numObj.toFixed(6)      // Returns '12345.678900': additional zeros
(1.23e+20).toFixed(2)  // Returns '123000000000000000000.00'
(1.23e-10).toFixed(2)  // Returns '0.00'
2.34.toFixed(1)        // Returns '2.3'
2.35.toFixed(1)        // Returns '2.4': it rounds up
2.55.toFixed(1)        // Returns '2.5': it rounds down as it can't
                       // be represented exactly by a float and the
                       // closest representable float is lower
2.449999999999999999.toFixed(1) // Returns '2.5': it rounds up as it less
                       // than NUMBER.EPSILON away from 2.45 and therefore
                       // cannot be distinguished
-2.34.toFixed(1)       // Returns '-2.3': due to operator precedence,
                       // negative number literals don't return a string…
(-2.34).toFixed(1)     // Returns '-2.3'

Specifications

Specification
ECMAScript Language Specification
# sec-number.prototype.tofixed

Browser compatibility

BCD tables only load in the browser

See also

What is the use of tofixed 2 in javascript?


This JavaScript tutorial explains how to use the Number method called toFixed() with syntax and examples.

Description

In JavaScript, toFixed() is a Number method that is used to convert a number to fixed-point notation (rounding the result where necessary) and return its value as a string. Because toFixed() is a method of the Number object, it must be invoked through a particular instance of the Number class.

Syntax

In JavaScript, the syntax for the toFixed() method is:

number.toFixed([decimalPlaces]);

Parameters or Arguments

decimalPlacesOptional. It is the number of digits after the decimal place to display in the result. If this parameter is omitted, the decimalPlaces will default to 0.

Returns

The toFixed() method converts a number to fixed-point notation with the indicated number of decimalPlaces (rounding the result where necessary) and then returns its value as a string.

If more decimal places are required than was present in the original number, the toFixed() method will pad the result with 0's after the decimal place.

Note

  • The toFixed() method will round the resulting value if necessary.
  • The toFixed() method will pad the resulting value with 0's if there are not enough decimal places in the original number.
  • The toFixed() method does not change the value of the original number.

Example

Let's take a look at an example of how to use the toFixed() method in JavaScript.

For example:

var totn_number = 123.456789;

console.log(totn_number.toFixed());
console.log(totn_number.toFixed(1));
console.log(totn_number.toFixed(2));

In this example, we have invoked the toFixed() method using the Number class.

We have written the output of the toFixed() method to the web browser console log, for demonstration purposes, to show what the toFixed() method returns.

The following will be output to the web browser console log:

123
123.5
123.46

In this example, the first output to the console log returned the string value "123" which is the fixed-point notation for 123.456789 rounded to 0 decimal places.

The second output to the console log returned the string value "123.5" which is the fixed-point notation for 123.456789 rounded to 1 decimal place.

The third output to the console log returned the string value "123.46" which is the fixed-point notation for 123.456789 rounded to 2 decimal places.

Specifying an Exponential Notation

The toFixed() method can also handle converting exponential notation values to fixed-point notation.

So if we rewrote our numeric value of 123.456789 as the equivalent exponential value (123.456789 = 1.23456789e+2), we could change our example as follows:

var totn_number = 1.23456789e+2;

console.log(totn_number.toFixed());
console.log(totn_number.toFixed(1));
console.log(totn_number.toFixed(2));

The following will be output to the web browser console log:

123
123.5
123.46

In this example, the first output to the console log returned the string value "123" which is the fixed-point notation for 1.23456789e+2 rounded to 0 decimal places.

The second output to the console log returned the string value "123.5" which is the fixed-point notation for 1.23456789e+2 rounded to 1 decimal place.

The third output to the console log returned the string value "123.46" which is the fixed-point notation for 1.23456789e+2 rounded to 2 decimal places.

Padding the Decimal Places

Finally, let's explore how the toFixed() method pads the result with 0's if there are not enough decimal places in the original number.

For example:

var totn_number = 123.45;

console.log(totn_number.toFixed(3));
console.log(totn_number.toFixed(4));

The following will be output to the web browser console log:

123.450
123.4500

In this example, the first output to the console log returned the string value "123.450" which is the fixed-point notation for 123.45 padded to 3 decimal places with 0's.

The second output to the console log returned the string value "123.4500" which is the fixed-point notation for 123.45 padded to 4 decimal places with 0's.

How do I get 2 decimal places in JavaScript?

To limit the number of digits up to 2 places after the decimal, the toFixed() method is used. The toFixed() method rounds up the floating-point number up to 2 places after the decimal.

How do I use toFixed in react JavaScript?

“react toFixed” Code Answer.
var c = a. toFixed(1); console. log(c); /* result ->*/ 3.3..
var g = a. toFixed(4); console. log(g); /* result ->*/ 3.3445..
var g = a. toFixed(7); console. log(g); /* result ->*/ 3.3445000..

How do you set decimal places to 2?

Rounding a decimal number to two decimal places is the same as rounding it to the hundredths place, which is the second place to the right of the decimal point. For example, 2.83620364 can be round to two decimal places as 2.84, and 0.7035 can be round to two decimal places as 0.70.

Is toFixed a string?

In JavaScript, toFixed() is a Number method that is used to convert a number to fixed-point notation (rounding the result where necessary) and return its value as a string. Because toFixed() is a method of the Number object, it must be invoked through a particular instance of the Number class.