What is the type of the following literal value?

[4.5, 3.2, 7.3]

Select one answer, then check.

• List
  Correct. Square brackets on their own always create a list, no matter what the element type is.
• Float
  Not quite. Float is the element type of this list, not the type of the whole value.
• Int
  Not quite. There are no integers here at all - every value has a decimal point.
• String
  Not quite. There are no quotes here, so none of these values are strings.
• Boolean
  Not quite. None of the values are True or False.
• None
  Not quite. The literal value is a list of three floats, not the special None value.

What is the element type of the following literal value?

[4.5, 3.2, 7.3]

Select one answer, then check.

• List
  Not quite. List is the type of the whole value, not the type of what's inside it.
• Float
  Correct. Every element (4.5, 3.2, 7.3) is a decimal number, so the element type is Float.
• Int
  Not quite. Each element has a decimal point, so it's a Float, not an Int.
• String
  Not quite. There are no quotes around any of the elements.
• Boolean
  Not quite. None of the elements are True or False.
• None
  Not quite. Every element is a number; none of them are the special None value.

True or false: Lists can also be correctly referred to as "Arrays" or "Vectors".

Select one answer, then check.

• True
  Not quite. The reading is explicit that "Array" and "Vector" describe slightly different concepts, and asks you not to use those words for a Python list.
• False
  Correct. "List" is the correct term in this course; "Array" and "Vector" are related but different concepts.

Which of the following are possible element types for a list?

Select every answer that applies, then check.

• Float
  Correct. A list can hold floats, just like [4.5, 3.2, 7.3].
• String
  Correct. A list can hold strings, just like ["Apples", "Oranges", "Bananas"].
• Boolean
  Correct. A list can hold booleans, just like [True, False, True].
• List
  Correct. A list's elements can themselves be lists - lists can be nested inside of other lists.

True or false: Lists and strings are both sequences of data.

Select one answer, then check.

• True
  Correct. This reading already indexes and subscripts lists with the exact same square-bracket rules used for strings, because both are sequences of values.
• False
  Not quite. Strings and lists share indexing, subscripting, and membership-testing rules precisely because both are sequences.