长生不老药，num = [9]，num被分配给‘t’

Question

iex> num = [9]
'\t'

分配一个9的列表返回'\t‘。这是什么原因？

Answer 1

有关数据类型的更多信息，可以使用i helper in IEx：

iex> i [9]  
Term
  '\t'
Data type
  List
Description
  This is a list of integers that is printed as a sequence of characters
  delimited by single quotes because all the integers in it represent valid
  ASCII characters. Conventionally, such lists of integers are referred to as
  "char lists" (more precisely, a char list is a list of Unicode codepoints,
  and ASCII is a subset of Unicode).
Raw representation
  [9]
Reference modules
  List

如果要检查原始表示形式，可以将char_lists: false传递给inspect

IO.inspect('abc', char_lists: false)
[97, 98, 99]