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.
Related Questions
if (a>b&&b>c) then largest number is:
- b
- c
- a
- wrong expression
Identify the operator that gets the highest precedence while evaluating the given expression:
a + b % c * d - e
- +
- %
- -
- *
A student executes the following code to increase the value of a variable ‘x’ by 2.
He has written the following statement, which is incorrect.
x = +2;What will be the correct statement?
A. x +=2;
B. x =2;
C. x = x +2;- Only A
- Only C
- All the three
- Both A and C