Question

In which of the following is “y” not equal to 5 after execution? X is equal to 4.

a) y = ++x; b) y = x = 5; c) y = 5; d) y = x++;

Answer 1

d) y=x++

Step-by-step explanation:

In all 3 statements:

y= ++x;

y=x=5;

y=5;

The value of y is equal to 5.

However in the statement y=x++, the value of 5 is equal to value of x prior to the increment operation. The original value of x was 4. So the value of y will be 4. Note that after the statement execution, the value of x will be updated to 5. In effect y=x++ can be visualized as a sequence of following steps:

x=4;

y=x;

x=x+1;