how to fix Index was outside the bounds of the array error?

i am trying to access an array elements and make some Logic gates operations over it, so basically i am trying to get the neighbors of each element, but i am getting the error, Index was outside the bounds of the array error.. thats one of my conditional if statements, and i know i am trying to access an element which is not exist either less than 0 element position or bigger than or = array.length

                if (states[i] == 0 && states[i + 1] == 0)
                {
                    states[i] = 0;
                }

any idea how to fix it?

Comments

[Katie Nelson]

If you are intentionally accessing something outside the array, put the code in a try/catch block:

try {
    // put code here
}
catch(IndexOutOfRangeException ex)
{
    // handle error here
}

[Zohar Peled]

Never attempt to catch an IndexOutOfRangeException when using arrays. This exception can be avoided simply by making sure your index is within the range - which in arrays means larger than -1 and smaller than array.Length.

For more information, read Eric Lippert's blog post entitled Vexing Exceptions

[Wael El-Sayegh]

Nope, it is not intentionally the purpose here is only to check the element neighbors only

[Zohar Peled]

I don't get this code. You're setting the array cell to 0 if it is 0 - why?

[Wael El-Sayegh]

to check the neighbors of the element in the array

[Zohar Peled]

this line states[i] = 0; doesn't make sense inside this condition, because you already know that the value in states[i] is 0.

And as for the exception - if you know i is smaller than the array's length, it means that i+1 must be equal to the array's length to throw that exception - so, guessing that this i is a for loop variable, you need the loop to stop one step before - so for(var i = 0; i < arr.Length - 1; i++) {/* do stuff here */}