How to get the base 10 logarithm of a Fixnum in Ruby?

Question

I want to get the base 10 logarithm of a Fixnum using Ruby, but found that n.log or n.log10 are not defined. Math::log is defined but uses a different base than 10.

What is the easiest way to get the base 10 logarithm of a Fixnum?

Answer 1

Reading the documentation for module Math the answer is really obvious:

Math::log10(n)

This gives the base 10 logarithm of n.

Answer 2

Math.log10(numeric) => float returns base 10 log

Answer 3

There is

Math::log10 (n)

And there is also a property of logarithms that logx(y) = log(y)/log(x)