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reverse a string without reverse method.
# the variables. a forward string
#the backward empty string.
#the holding array
forwards = "hello this is a string. In a moment it will be reversed without using the 'reverse' method."
backwards = ""
holding_array = []
#put the string in the array
forwards.each_char {|letter| holding_array.push(letter)}
#it's first in first out. We push the letters one by one into an array. then we pop them back out into the backwards string
holding_array.length.times {|letters| backwards << holding_array.pop}
puts forwards
puts backwards
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