The use of ++ and zero

Question

I'm new to the use of ++ before/after a variable and the impact on zero. The code segment I'm trying to review is:

int i = 0;
int x = 0;
int y;

while (i<3) {x=x+5;i++;}

Does this increment 0 to 1 and then increment 5 to 6? And is y = 0, by the lack of value assignment? My reasoning would have i=1, x=6 and y=0. Am I close or way off?

Many thanks!!

Answer 1

loop 1
i = 0 so
x = x + 5. (or x = 0 + 5) x is now 5
i++ (i adds 1) i is now 1

loop 2
i = 1
x = x + 5 (or x = 5 + 5) x is now 10
i++ (i adds 1) i is now 2

loop 3
i = 2
x = x + 5 (or x = 10 + 5) x is now 15
i++ (i adds 1) i is now 3

loop 4
i = 3 so it doesnt run

y has not been touched, so it has no value yet.

I hope this helps!

Answer 2

x initial value is 0 and then 5 is added to it so x = 5 after the first loop iteration. During the second iteration it gets added 5 again and becomes 10, and finally 15. Variable i gets icremented by 1 with each loop iteration so it's equal to 1, then 2 and finally 3. y is never assigned any value. Programming languages will treat it differently. For example, C# won't let you use it until you assign a value to it.

Answer 3

Wow! Pretty rookie of me to see the loop but not factor the incremental cycle of the variables final value!

Thank you both for your time and input!!