Math.log10()

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

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

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.

This can be emulated with the following function:

Math.log10 = Math.log10 || function(x) {
  return Math.log(x) * Math.LOG10E;
};

• Polyfill of Math.log10 in core-js
• Math.exp()
• Math.log()
• Math.log1p()
• Math.log2()
• Math.pow()