Find Average

'use strict';

const getGets = (arr) => {
    let index = 0;

    return () => {
        const toReturn = arr[index];
        index += 1;
        return toReturn;
    };
};
// this is the test
const test = [
    '10,12,14,13'

];

const gets = this.gets || getGets(test);
const print = this.print || console.log;

//here is the solution:
const input = gets().split(',').map(el => +el);
print(input);
const length = input.length;

let sum = 0;
for (let index = 0; index < input.length; index++) {
    sum += input[index];
}

let average = sum / length;
print(average.toFixed(2));