Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Vic Mercier
Vic Mercier
3,276 Points
Posted by Vic Mercier
Vic Mercier
3,276 Points

Array

Why when I print to the console I need to do sudent[i]Why do I need to add I in square brackets?

1 Answer

Brady McAtee
Brady McAtee
2,657 Points
Brady McAtee
Brady McAtee
2,657 Points

[i] indicates the position of the item in an array. If you're looping through the array, [i] will increment​ by 1 each time the loop is ran because of the i+=1 line. Therefore, the first time the loop is ran, i = 0, so student[i] will return the first item in the array. Then, i increments by 1 so that the next time the loop is ran, i = 1, and student[i] will return the 2nd item in the array.