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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Using For Loops with Arrays

Posted by Silvia Ramos
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Silvia Ramos
Front End Web Development Techdegree Graduate 18,318 Points

Function? VAR and LET in Arrays for Loops.

Hallo!

May sound like a silly question but JS is getting on my nerves.. I have literally spent 2h on this video... anyway, why does he uses a function? is it a good practise to include a function on 'for loops arrays'?

Also, I thought using 'LET' was a better practise than using 'VAR', and it was my first option, however when I checked it out, the console came up with an error.

Mine looks a bit different from the teacher's, but I have included this here in case someone can check it and provides some feedback :) as I don't want to assume is it's correct, just because ''it works''.

var playList = [
  'I Did It My Way',
  'Respect',
  'Imagine',
  'Born to Run',
  'Louie Louie',
  'Maybellene'
];

var htmlList = "<ol>";
for (var i = 0; i <= playList.length; i += 1 ) {
    htmlList += `<li>  ${playList[i]} </li>`;

}  htmlList += '</ol>' ;

document.write(htmlList)

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

This should work equally well with "var" or "let", but the one issue i see is that the loop runs one time too many:

for (let i = 0; i < playList.length; i += 1 ) {

Changing the comparison limits the loop to the existing array items.