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type(data)This function returns a symbol giving the type of data. The return value is one of
'integer, 'string, 'dbref,
'list, 'symbol, or 'error.Examples:
type(5)
=> 'integer
type([6, 'foo, "bar"])
=> 'list
type(<#44, #[['type, 'obj], ['obj, #20]]>)
=> 'frob