How can I calculate natural log of a number?

Question

f64 has an pub fn ln(self) -> f64 to calculate natural log. How can I do that in substrate without using floating points.

You can work with different representation of numbers. For example after getting an answer like 2.5 you do 2.5 * 10 and in the front end you can divide back. — Mrisho Lukamba, Commented Jun 13, 2022 at 18:05
In what context do you want to use this? What base specifically do you need? Perhaps e also know as natural? What accuracy do you need in the result and why? — Nuke, Commented Jun 13, 2022 at 21:23
Was thinking of logarithmic inflation of tokens. 4 to 5 decimal accuracy would be fine. — Amiya Behera, Commented Jun 14, 2022 at 9:57

aurexav · Accepted Answer · 2024-05-27 02:24:40Z

1

There is a great library to handle the float calculation.

For your case, you can use substrate_fixed::transcendental::ln.

answered May 27 at 2:24

aurexav♦

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