string = 'proton' string[0..1] # pr string[-2..-1] # on string[1..2] # ro # reverse a string string.reverse # notorp # skip every second character string.chars.select.with_index { |_, character| character.even? }.join # poo ''' Michael Sjoeberg 2018-11-07 https://github.com/michaelsjoeberg/ruby-playground/blob/master/basic-syntax/string-indexing.rb '''