math-log-function-javascript.md

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Math.log Function (JavaScript) | Microsoft Docs		01/18/2017	windows-client-threshold			devlang-javascript		language-reference	log	JavaScript TypeScript DHTML	log method Math object	5d617fb5-4b27-404e-842f-eea5549a7c1a	9	mikejo5000	mikejo	ghogen

Math.log Function (JavaScript)

Returns the natural logarithm (base e) of a number.

Syntax

Math.log(number)   

Parameters

number
A number.

Return Value

If number is positive, this function returns the natural logarithm of the number. If number is negative, this function returns NaN. If number is 0, this function returns -Infinity.

Example

The following code shows how to use this function.

var numArr = [ 45.3, 69.0, 557.04, 0.222 ];  
  
for (i in numArr) {  
    document.write(Math.log(numArr[i]));  
    document.write("<br/>");  
}  
  
// Output:   
// 3.8133070324889884  
// 4.23410650459726  
// 6.322637050634291  
// -1.5050778971098575  

Requirements

[!INCLUDEjsv1]

Applies To: Math Object

See Also

Math.sqrt Function