JAVASCRIPT

javascript average of arguments

const average = (...args) => args.reduce((a, b) => a + b) / args.length;

// Example
average(1, 2, 3, 4);    // 2.5

JavaScript average function

const arr = [5,10,15,20,25];
        arr.reduce(function(x,y){
            sum = x+y;
            mean = sum/arr.length;
            return sum;
        },
        0);
         console.log(mean);//15