Iterate over characters in a string

[spiralofhope]

Drawn from https://stackoverflow.com/a/51052644/1190568

string='example'
__="$string"
while [ -n "$__" ]; do
  # All but the first character of the string
  rest="${__#?}"
  #  Remove $rest, and you're left with the first character
  first_character="${__%"$rest"}"
  echo "$first_character"
  __="$rest"
done