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Math.log10()

The Math.log10() function returns the base 10 logarithm of a number, that is

$\forall x > 0, \mathtt{\operatorname{Math.log10}(x)} = \log_{10}(x) = \text{the unique} ; y ; \text{such that} ; 10^y = x$

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Syntax

Math.log10(x)

Parameters

x: A number.

Return value

The base 10 logarithm of the given number. If the number is negative, NaN is returned.

Description

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.

Examples

Using Math.log10()

Math.log10(2);      // 0.3010299956639812
Math.log10(1);      // 0
Math.log10(0);      // -Infinity
Math.log10(-2);     // NaN
Math.log10(100000); // 5

Specifications

Specification
ECMAScript Language Specification # sec-math.log10

Browser compatibility

	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