Question

Consider the following code segment, which is intended to display 6.0.

double fact1 = 1 / 2;
double fact2 = 3 * 4;
double product = fact1 * fact2;
System.out.println(product);
Which of the following best describes the error, if any, in the code segment?
A. There are no errors and the code works as intended.
B. Either the numerator or the denominator of the fraction 1 / 2 should be cast as double.
C. The expression fact1 * fact 2 should be cast as double.
D. The expressions 1 / 2 and 3 * 4 should both be cast as double.
E. The variables fact1 and fact2 should both be declared as int.

Answer 1

The error in the code segment is due to integer division in the expression 1 / 2 which should instead involve at least one double value to obtain the correct double result. The numerator or the denominator of the fraction should be explicitly cast as a double.

Step-by-step explanation:

The code segment you provided contains an error in the way the division is performed. The division operation 1 / 2 will yield 0 instead of 0.5 because it performs integer division since both 1 and 2 are integers. To obtain the correct result as a double in Java, at least one of the operands should be a double. Therefore, the correct choice is (B) Either the numerator or the denominator of the fraction 1 / 2 should be cast as double, which will result in fact1 being assigned the correct double value of 0.5.

The multiplication fact1 * fact2 does not need to be cast because the variables fact1 and fact2 are already declared as double, and thus their product will be a double.