Computer Applications
A student needs to calculate the average of three numbers x, y, and z. Which is the correct Java expression for this calculation?
Answer
(x+y+z)/3.0
Reason — Division (/) has higher precedence than addition (+), so without parentheses, the division would happen before the addition. Using parentheses ensures that the sum x + y + z is calculated first, and then divided by 3.0. Using 3.0 ensures the division is performed as floating-point, avoiding integer truncation. This guarantees the correct calculation of the average.