Function mean

mean(values: number[]): number
Calculates the mean (arithmetic mean) of an array of numbers.
Parameters
- values: number[]
  An array of numbers.
Returns number
The mean value, or 0 if the array is empty.
Example
```
mean([1, 2, 3]); // returns 2
mean([10, 20]); // returns 15
mean([]); // returns 0
```
- Defined in mean/mean.ts:16