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
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.
Applies To: Math Object