C# Loop Array Index Values back to Beginning of Array once out of Index

Question

I am looking to create a program like the following (c# btw):

int[] arr = new int[9]
//some code that puts values 1, 0, or 2 in each array element
for(int i          


        

Answer 1

Use the modulo operator like this:

if (arr[i] == arr[(i + 3) % arr.Length]) { return true; }