JavaScript toFixed() Method Example

JavaScript Number toFixed() method

JavaScript: Number toFixed() method; In this tutorial, You will learn how to use the number method called toFixed with new examples. And as well as learn how to number tofixed without rounding in javaScript.

JavaScript: Number toFixed() method

The JavaScript toFixed () method is used to round( formats ) a number to a fixed notation point or convert the number into a string and its representation of a number with a specified number of decimal points. It returns value as a string.

Syntax:

Here,

• The first thing is n is an optional parameter in toFixed function.
• The second thing is, n is a number of digits after the decimal place to display in the result.

List of Examples of Number toFixed Methods

Let’s take a look at an example javascript number format one decimal point, two decimal points or without decimal using the toFixed() method in JavaScript.

var number = 111.123456; number.toFixed(); number.toFixed(1); number.toFixed(2); //Output 111 111.1 111.12

Source code of this Example

     Click & See Result   

Demo of toFixed() javaScript

JavaScript toFixed() Method Example Click & See Result

Note

Assuming you have a decimal number greater than the real number, taps are added to make the desired decimal length.

How can I round a number in JavaScript? .toFixed() returns a string?

Javascript toFixed With and Without Rounding

Let’s take a new example for rounding a number with or without using .toFixed function.

     Click & See Result 
 
With Round :- )?/)[0]; document.getElementById("withRound").innerHTML = withRound; document.getElementById("roundValue").innerHTML = with2Decimals; >   

Demo of Javascript toFixed With and Without Rounding

Javascript tofixed With and Wthout Rounding Example Click & See Result

Let’s see more examples javascript tofixed method

var num = 12345.6789; num.toFixed(); // Returns '12346': note rounding, no fractional part num.toFixed(1); // Returns '12345.7': note rounding num.toFixed(6); // Returns '12345.678900': note added 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'. Note it rounds up 2.55.toFixed(1); // Returns '2.5'. Note it rounds down - see warning above -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'

Conclusion

In this tutorial, you have learned how to use javascript .tofixed function with examples

If you have any questions or thoughts to share, use the comment form below to reach us.

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Number.prototype.toFixed()

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

Try it

Syntax

Parameters

The number of digits to appear after the decimal point; should be a value between 0 and 100 , inclusive. If this argument is omitted, it is treated as 0 .

Return value

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

Exceptions

Thrown if digits is not between 0 and 100 (inclusive).

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

Description

The toFixed() method 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 10 21 , this method uses the same algorithm as Number.prototype.toString() and returns a string in exponential notation. toFixed() returns «Infinity» , «NaN» , or «-Infinity» if the value of numObj is non-finite.

The output of toFixed() may be more precise than toString() for some values, because toString() only prints enough significant digits to distinguish the number from adjacent number values. For example:

(1000000000000000128).toString(); // '1000000000000000100' (1000000000000000128).toFixed(0); // '1000000000000000128' 

However, choosing a digits precision that’s too high can return unexpected results, because decimal fractional numbers cannot be represented precisely in floating point. For example:

(0.3).toFixed(50); // '0.29999999999999998889776975374843459576368331909180' 

Examples

Using toFixed()

const numObj = 12345.6789; numObj.toFixed(); // '12346'; rounding, no fractional part numObj.toFixed(1); // '12345.7'; it rounds up numObj.toFixed(6); // '12345.678900'; additional zeros (1.23e20).toFixed(2); // '123000000000000000000.00' (1.23e-10).toFixed(2); // '0.00' (2.34).toFixed(1); // '2.3' (2.35).toFixed(1); // '2.4'; it rounds up (2.55).toFixed(1); // '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); // '2.5' // it rounds up as it's less than NUMBER.EPSILON away from 2.45. // This literal actually encodes the same number value as 2.45 (6.02 * 10 ** 23).toFixed(50); // 6.019999999999999e+23; large numbers still use exponential notation 

Using toFixed() with negative numbers

Because member access has higher precedence than unary minus, you need to group the negative number expression to get a string.

-2.34.toFixed(1); // -2.3, a number (-2.34).toFixed(1); // '-2.3' 

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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JavaScript Number toFixed()

The toFixed() method rounds the string to a specified number of decimals.

Note

If the number of decimals are higher than in the number, zeros are added.

Syntax

Parameters

Return Value

More Examples

Browser Support

toFixed() is an ECMAScript3 (ES3) feature.

ES3 (JavaScript 1999) is fully supported in all browsers:

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

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JavaScript: Number toFixed() method

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

decimalPlaces Optional. 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.

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:

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:

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.

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:

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.

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