How to use toExponential() Method In Javascript

Q: How to use toExponential() Method In Javascript

The number of total digits in float values can be set using the toPrecision() method. This method converts the number into a string, keeping the total number of digits of the value as specified and rounding them to the nearest number. If no value is passed as a parameter, then the function acts as a toString() function effectively returning the value passed as a string.

Using toPrecision() Method

JavaScript Number toExponential() method is used to convert a number to its exponential form. It returns a string representing the Number object in exponential notation. The toExponential() method is used with a number as shown in the above syntax using the ‘.’ operator. This method will convert a number to its exponential form.

Syntax:

number.toExponential(value)

Example: toExponential(2) represents the number 12345.6789 in exponential notation with 2 digits of precision. The output might look like 1.23e+4, where 1.23 is the significand and 4 is the exponent.

Javascript

const myNumber = 12345.6789;
 
// Using toExponential with precision
const exponentialNotation = myNumber.toExponential(2);
 
console.log(exponentialNotation);

Output

1.23e+4

Floating point number precision in JavaScript

The representation of floating points in JavaScript follows the IEEE-754 format. It is a double-precision format where 64 bits are allocated for every floating point.

The displaying of these floating values could be handled using these methods:

Table of Content

Using toFixed() Method
Using toPrecision() Method
Using toExponential() Method

Tags:

#JavaScript-Questions #JavaScript #Web Technologies

Using toPrecision() Method

How to use toExponential() Method In Javascript

Syntax:

Javascript

Floating point number precision in JavaScript

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