iteration1.js

var prices = [400, 80, 375, 870];

// 1
for (var i = 0; i < prices.length; i += 1) {
  console.log(prices[i]);
}
  // logs 400, 80, 375, 870

// 2
for (var k in prices) {
  console.log(prices[k]);
}
  // logs 400, 80, 375, 870
  
// 3
for (var v of prices) {
  console.log(v);
}
  // logs 400, 80, 375, 870
  
// 4
prices.forEach(function(val) {
  console.log(val);
});
  // logs 400, 80, 375, 870