The Math.log10()
function returns the base 10 logarithm of a number, that is
The Math.log10()
function returns the base 10 logarithm of a number, that is
Math.log10(x)
x
A number.
The base 10 logarithm of the given number. If the number is negative, NaN
is returned.
If the value of x
is less than 0, the return value is always NaN
.
Because log10()
is a static method of Math
, you always use it as Math.log10()
, rather than as a method of a Math
object you created (Math
is not a constructor).
This function is the equivalent of Math.log(x) / Math.log(10). For log10(e) use the constant Math.LOG10E
which is 1 / Math.LN10
.
Math.log10(2); // 0.3010299956639812 Math.log10(1); // 0 Math.log10(0); // -Infinity Math.log10(-2); // NaN Math.log10(100000); // 5
This can be emulated with the following function:
Math.log10 = Math.log10 || function(x) { return Math.log(x) * Math.LOG10E; };
Specification |
---|
ECMAScript Language Specification # sec-math.log10 |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
log10 |
38
|
12
|
25
|
No
|
25
|
8
|
38
|
38
|
25
|
25
|
8
|
3.0
|
1.0
|
0.12.0
|
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/log10