30-seconds-of-code/snippets/average-of-array-of-numbers.md

Average of array of numbers

Use reduce() to add each value to an accumulator, initialized with a value of 0, divide by the length of the array.

const average = arr =>
  arr.reduce( (acc , val) => acc + val, 0) / arr.length;
// average([1,2,3]) -> 2