Array iteration refers to iterating over a list or an array. Basically, it loops through that array and do something to each item or with each item. Use For Loop We use for loop to loop over an array. In order to do that, we need to make use of the array's length property. For example, if we want to print out each item from an array, we need to recall the index of each item. In this case, we want to print out each letter from the array, so we have to type the code for times. It is repeating a lot. Image we have hundred or thousands data and print it all out, it will drive us crazy. Therefore, we use a loop to help automate this process because what we are doing here is the same operation. Using for loop can save our time and make the code clean. var letters = ["a", "b", "c", "d"] for(var i = 0; i < letters.length; i++) { console.log(color[i]); } In the for loop, we have our variable i start with 0 because that ...