Reverse Given Input and fibonacci series

solution-01.rb

def get_reverse(str)
	str.reverse
end
str = "hello"
puts get_reverse(str)

solution-02.rb

=begin
A fibonnaci sequence is defined like the following
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
The next number is found by adding up the two numbers before it. The first two numbers of
the sequence are 0,1.
Write a function that outputs the nth number in the series
For example, ```
fibonnaci(0) => 0
fibonnaci(1) => 1
fibonnaci(4) => 3
fibonnaci(7) => 13```
Your function should work for large numbers of
=end

def fibonacci(n)
	return n if [0,1].include?(n)
  (1...n).inject([0,1]) { |number| number << number.last(2).inject(:+) }.last
end
p fibonacci(0)
p fibonacci(1)
p fibonacci(3)
p fibonacci(7)