toExponential()  Number  instance method JS Home  <<  JS Reference  <<  Number  <<  toExponential()

Description

Returns a string representation of the number in exponential notation.

Syntax

Signature Description
aNumber.toExponential([numOfFractionalDigits])Returns a string representation of the number in exponential notation.

Parameters

Parameter Description
numOfFractionalDigitsAn optional integer specifying the number of fractional digits to display.
  • When omitted the number of fractional digits required to display the number uniquely are used.
  • When used and there are more digits to display than specified, the fractional return of the answer will be rounded appropriately.

Examples

The code below displays some numerical values exponentiated.


// Create an array for strings and populate.

var aNumber = 16.456456456;
var stringValue = new Array(4);

stringValue[0] = aNumber.toExponential(); 
stringValue[1] = aNumber.toExponential(2); // 2 decimal Places

stringValue[2] = aNumber.toExponential(4); // 4 decimal Places
stringValue[3] = aNumber.toExponential(6); // 6 decimal Places
alert(stringValue);

Press the button below to action the above code:

Related Tutorials

JavaScript Advanced Tutorials - Lesson 3 - Number

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Globals

Number

MIN_VALUE
NaN
NEGATIVE_INFINITY
POSITIVE_INFINITY
prototype
Instance Properties
constructor
Class Methods
None.
Instance Methods Getters
toExponential()
toFixed()
toLocaleString()
toPrecision()
toString()
valueOf()
Instance Methods Setters
None.

Statements

Operators