asuluntas

// function each(coll, f) {
//   if (Array.isArray(coll)) {
//     for (var i = 0; i < coll.length; i++) {
//       f(coll[i], i);
//     }
//   } else {
//     for (var key in coll) {
//       f(coll[key], key);
//     }

asuluntas

// function each(array, func) {
//   for (var i = 0; i < array.length; i++) {
//     func(array[i]);
//   }
// }
// var arr = [1, 2, 3, 4];
// function sumSquares(numbers) {
//   var total = 0;
//   each(numbers, function(x) {
//     total += x * x;

asuluntas

// function each(array, func) {
//   for (var i = 0; i < array.length; i++) {
//     func(array[i]);
//   }
// }
// var arr = [1, 2, 3, 4];
// function sumSquares(numbers) {
//   var total = 0;
//   each(numbers, function(x) {
//     total += x * x;

asuluntas

function coinFlip() {
  //get either 0 or 1 randomly
  var random = Math.floor(Math.random() * 2);
  //if the number is 0
  if (random === 0) {
    //return head
    return 'head';
    //if the number is 1
  } else {
    //return tail

asuluntas

function toggleCase(string) { 
  //input = string 
  //split string's characters so we can work with them individualy
  var strArr = string.split('');
  //define a variable to keep toggled characters
  var toggled = []; 
  //loop through each element in the string array 
  for (var i = 0; i < strArr.length; i++) { 
    //if it is a lower case
    if (strArr[i] === strArr[i].toLowerCase()) {

asuluntas

function calculateTotalWithTax (subTotal) {
  var tax= subTotal * (9.75 / 100);
  var withTax = subTotal + tax;
  return withTax;
}

// calculateTotalWithTax(250); //274.375
// calculateTotalWithTax(500); //548.75

function countBy (number) {

asuluntas

// Flip every pair of characters in a string.


// Example:
// var input = 'check out how interesting this problem is, it\'s insanely interesting!';
// var output = flipPairs(input);
// console.log(output); // --> hcce kuo toh wnietertsni ghtsip orlbmei ,si 't sniasenyli tnreseitgn!
// input = string
// output = string