What is wrong with this exercise?

Question

What is the output ?
int y;
for (y=2;y<=6;y+=2)
cout <<y;

My answer is 246, but the SoloLearn program was accepting only a single number.

This must be a mistake.

Answer 1

No, it's nothing wrong.

If 2 is less then 6 then 2 + 2
This loops untill y is no longer less or is equal to 6
2+2+2 = 6

y+=2 operator means basically y = y + 2

Hope this helps.

Answer 2

I guess that its a for with empty code or inmediatly ';', so its empty, and shows 6.

Answer 3

Maybe you have "{};" after the for? That means that the for loops till the end, then the cout is executed only once, after the for loop has finished.

Answer 4

correct answer 246
if you use this
cout <<y <<endl; output :
2
4
6
if you want sum
int sum+=y;
cout <<sum; output :
12