Please explain me why in this code output is 14.

Question

Such a code:

int x = 19;
int y = x%3;
while (y<3)
x -= ++y;
Console.WriteLine(x);

Visual studio issues 14.
I tried to understand the difference between ++y and y++ and could not. Please help me.

Answer 1

You already got detailed explanation about the code from Nasif Rahman 's answer.

Further check this lesson..
It'll clear your doubts between prefix and postfix.

https://www.sololearn.com/learn/CSharp/2590/?ref=app

Answer 2

First y =1
x-=++y //x=19,++y=2(y=y+1),x=x-y=17
x-=++y //x=17,++y(y=y+1)=3,x=x-y=14

I hope you understand!

Answer 3

Thank you very much, guys! Nasif Rahman Vadivelan
Can you also describe an exactly the same example, but with y++?

Then I will certainly understand everything. Thanks!

Answer 4

https://code.sololearn.com/c8xhfsCXgt74/?ref=app
https://code.sololearn.com/cc5B9nQA82yR/?ref=app

a = 0
++a = 1
a == 1 //true

b = 0
b++ = 0 (if b++==0 //true, if ++b ==0 //false)
b == 1 //true