A program to append the pisano period into an array

pisano.go

func getPisanoPeriodFast(n int) []int  {
	var period []int

	period = append(period, 0, 1)

	var remainder int

	for index := 0; index < n*n; index++ {
		remainder = (period[index] + period[index+1]) % n 

		if remainder == 1 && period[index+1] == 0 {
			return period[:index+1]
		}
		
		period = append(period, remainder)
	}

	return period
}