log - nodef/extra-number GitHub Wiki

Find the logarithm of a number with a given base.

function log(x, b)
// x: a number
// b: logarithm base [e]

const xnumber = require('extra-number');


xnumber.log(Math.E);
// → 1

xnumber.log(10);
// → 2.302585092994046

xnumber.log(243, 3);
// → 5

xnumber.log(64, 2);
// → 6

References

• Logarithm: Wikipedia