Question

3. What is the value of y after evaluating the expression given below? x= ++x + x--; when int x=5​

Answer 1

x=5 5+5+5=15+++++++++++

Answer 2

The answer is 10.

Explanation:

++x means, x = x+1

x-- means, x=x-1

When x=5

++x is a pre-increment operator and x-- is the post-decrement operator.  

In ++x, the value of x will increase firstly, and then it will be used.  

So, ++x will be 5

Now, the value of x is 5.

And we will use x=5 for further operations.  

x=x-1

x= 6-1

x=5

x-- will be 5.

The expression is x= ++x + x--;  

Therefore, the answer is x= 5+5 =10