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JavaScript

Posted by Kristian Woods
Kristian Woods
23,414 Points

Arrays and for loops in javascript

Just doing a bit of a refresher on arrays and for loops. just so I understand; 

var myArray = ["bread", "coffee", "milk"];

for (var i = 0; i < myArray.length; i++) {
    console.log(myArray[i]);
}

so [i] makes its way through the length of items in the array - so once you want to access all the information within the array, you use the [i] as the index position. Just like you would if you wanted to retrieve a single item

So, is this correct thinking? basically all items have a shared index value of [i]?

var myArray = [
 "bread", //[0][i]
 "coffee", //[1][i]
 "milk"  //[2][i]
];

1 Answer

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

I would be careful with [0][i] because that looks like a two-dimensional array. Basically, i is a placeholder for numbers 0 thru 2 here and in each iteration of the loop i assumes one of those values. So, myArray[0] refers to the first item in the array, which is "bread", myArray[1] refers to the second item in the array, which is "coffee", and myArray[2] refers to the third item in the array, "milk".

Kristian Woods
Kristian Woods
23,414 Points

Hey, thank you for getting back to my question. Yes, absolutely. I didn't mean to cause confusion. I only included the [i] to show that each item in the array has been passed by the [i] variable. Not to create a two dimensional array.