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

Java Arrays

Paul Henry
Paul Henry
2,125 Points
Posted by Paul Henry
Paul Henry
2,125 Points

In the for loop...

So we have

for (int i = 0; i < jacksons.length; i++)

Why wouldn't the loop stop before the last item in the array, if "i" must be less than the length of the array?

2 Answers

Kristian Gausel
Kristian Gausel
14,661 Points
Kristian Gausel
Kristian Gausel
14,661 Points

Because arrays are 0 indexed, so an array of length 5: [0, 1, 2, 3, 4,] (it has 5 elements, which is the length) Has the indexes i put as values in the array. Therefore you want to check the indexes from 0 to length - 1

Quinton Rivera
Quinton Rivera
5,177 Points
Quinton Rivera
Quinton Rivera
5,177 Points

you start counting from 0 not 1 with arrays