Question

In Javascript

Define 2 functions in JSBin:

- A function which receives an array of numbers as an argument, and returns the product of all the numbers in that array.
  For example, multiply([2,3,4]) should return 24.

- A function which receives a string as an argument, and returns the reversal of that string.
  For example, reverse('Hello there!') should return "!ereht olleH"

Answer 1

function multiply(numbers) {
    var result = 1;
    for (var i = 0; i < numbers.length; i++) {
        result *= numbers[i];
    }
    return result;
}

function reverse(s) {
    var rev = "";
    for (var i = 0; i < s.length; i++) {
        rev = s[i] + rev;
    }
    return rev;
}