In the application shown below what data type is Tall? Begin Input Height If Height 1.9 Then Tall ← True Else Tall ← False End If Print Tall End

Question

In the application shown below what data type is Tall? Begin Input Height If Height > 1.9 Then Tall ← True Else Tall ← False End If Print Tall End

BlackTom AI · Accepted Answer

Tall is assigned the values True or False, so its data type is Boolean.

1. Relevant knowledge points and concepts
- A Boolean data type can hold one of two truth values: True or False.
- A comparison expression like Height > 1.9 evaluates to a Boolean result.
- Other common types: Integer (whole numbers), Decimal (floating-point numbers), String (text).

2. Step-by-step reasoning
- The program reads a variable Height (presumably numeric) and evaluates the condition Height > 1.9.
- The If statement uses that condition to choose between two assignments:
  - Tall ← True
  - Else Tall ← False
- After the If/Else the program prints Tall.

3. Calculations / intermediate steps
- There are no arithmetic calculations to perform here; the key operation is the comparison Height > 1.9 which yields either True or False.
- Example: if Height = 2.0 then (2.0 > 1.9) is True → Tall ← True. If Height = 1.7 then (1.7 > 1.9) is False → Tall ← False.

4. Why the correct answer is correct
- Tall is explicitly assigned the literal values True and False. Only the Boolean type represents those truth values, so Tall must be Boolean.

5. Why the other options are incorrect
- a. Integer: Integers store whole numbers (e.g., 1, 2, -3); they do not directly represent True/False.
- b. String: Strings store text (e.g., "True"), but the code uses logical values True/False, not text literals.
- c. Decimal: Decimals store real numbers (e.g., 1.9, 2.0); Tall is not assigned a numeric value.

6. Conclusion / final confirmation
- Therefore the correct data type for Tall is d. Boolean, which matches the provided answer.

In the application shown below what data type is Tall? Begin Input Height If Height > 1.9 Then Tall ← True Else Tall ← False End If Print Tall End单项选择题

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