This is a `playground`

to test code. It runs a full `Node.js`

environment and already has all of `npm`

’s 400,000 packages pre-installed, including `factorial-ln`

with all `npm`

packages installed. **Try it out**:

var factorialLn = require("factorial-ln")

- all documents on RunKit are public
`require()`

any package directly from npm- use arrow functions, classes, template strings, and most of ES6
`await`

any promise instead of using callbacks (example)- create your own embedded
**node.js**snippets

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

compute log(n!) of huge numbers

```
var factorialln = require('factorial-ln')
factorialln(171) // would return Infinity with 'factorial' package
```

```
npm install factorial-ln
```

By working with `log(n)`

rather than `n`

, we can deal with huge numbers without loss of precision, overflow, or underflow. No big number library is required, at least until we have reason to switch back into non-log. In many cases, such as where really big and really small numbers are only used internally in certain computations, we can completely avoid the use of a big number library.

Also, multiplication is much faster in log space (you add). The same for division (you divide). This is never a bad thing.

This module exports a single function which simply computes `log(n!)`

.

MIT

- package on npmhttps://npmjs.com/package/factorial-ln
- licenseMIT

RunKit is a free, in-browser JavaScript dev environment for prototyping **Node.js** code, with every **npm** package installed. Sign up to share your code.

Sign Up for Free