func fibonacci()

in dubbo-go-server/main.go [88:106]

• 17 lines of code
• 5 McCabe index (conditional complexity)

func fibonacci(n int64) (int64, error) {
	if n < 0 {
		return 0, ErrNShouldGreaterThanZero
	}
	if n < 2 {
		return n, nil
	}

	f1, err := fibonacci(n - 1)
	if err != nil {
		return 0, err
	}
	f2, err := fibonacci(n - 2)
	if err != nil {
		return 0, err
	}

	return f1 + f2, nil
}