CPM Homework Help : CCA2 Problem 8-92

Describe how you would evaluate $i^n$ where $n$ could be any integer.

Hint:

What is the value if n is a multiple of $4$ ?
If $n$ is a multiple of $4$ , plus $1$ ?
If $n$ is a multiple of $4$ , plus $2$ ?
If $n$ is a multiple of $4$ , plus $3$ ?