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
Write a difference between unary and binary operator.
Evaluate the following expression if the value of x=2, y=3 and z=1. v=x + --z + y++ + y
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