Question

What is the type and value of the following expression? (Notice the integer division)

-4 + 1/2 + 2*-3 + 5.0
(a) int -5
(b) double -4.5
(c) int -4
(d) double -5.0
(e) None of the above.

Answer 1

The type of the expression is double and its value is -4.5.

Step-by-step explanation:

The type of the expression is double and its value is -4.0.

To evaluate this expression, we follow the order of operations: first, we perform the multiplication (-4 + 1/2 + 2*-3 = -4 + 0.5 - 6 = -9.5). Then, we add the remaining terms (-9.5 + 5.0 = -4.5).

Therefore, the type of the expression is double and its value is -4.5.

Answer 2

(b) double -4.5 is obtained by following the correct order of operations, and the value is a double due to the presence of a decimal in the result, thereby making option (b) the correct choice.

Explanation:

The expression evaluates to -4.5. Starting with the given expression -4 + 1/2 + 2*-3 + 5.0, it follows the order of operations (PEMDAS/BODMAS). The division 1/2 results in 0.5. Then, 2 * -3 equals -6. Adding all the elements together, -4 + 0.5 - 6 + 5.0 gives us the final result of -4.5.

This expression involves integer division, multiplication, addition, and subtraction. Initially, the addition and multiplication are performed: -4 + 0.5 - 6. Subsequently, these results are added to 5.0, leading to the total value of -4.5, which is a double data type due to the presence of a decimal point.

The expression’s final answer, -4.5, is obtained by following the correct order of operations, and the value is a double due to the presence of a decimal in the result, thereby making option (b) the correct choice.

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