Plz explain me this code

Question

What is exactly happening here 👇

#include <iostream>
using namespace std;

int main() {
int x=3;
while (x++<10){
x+=2;
}
cout<<x;
return 0;
}

Answer 1

Krishnendu Dey Let's examine

x is initialized to 3, then we enter the while loop
Pass 1
x is less than 10 so ++ x is now 4
then +=2 and x is now 6
Pass 2
x is less than 10 so ++ x is now 7
then +=2 and x is now 9
Pass 3
x is less than 10 so ++ x is now 10
then +=2 and x is now 12
Pass 4
x is not less than 10 so ++ x is now 13
We fall out of the while loop
We cout<<x and 13 is displayed in the console

Answer 2

Yes Paul K Sadler sir, you are right , the correct output is 13, I just missed the last post increment to calculate.

But I think you just misunderstood something, I neither upvoted nor downvoted any answer/question of this post. You can clarify by referring to any moderator.

Regards!!!

Answer 3

As long a the value of x is smaller than 10 the loop continues and x is increased by 2.
At the beginning of each iteration x is evaluated if it is still smaller than 10, then it is increased by 1

Answer 4

It will print 12, cause loop will execute 3 times and each time in loop the value of x is increased by 3.

the correct output will be 13, thanks for correcting me Paul K Sadler .

Answer 5

Saurabh Kumar Yadav Actually that is not correct. The condition is evaluated as false and then the ++ increments x to 13 before falling out of the while loop.

Answer 6

Paul K Sadler Thank you sir for explaining 🙏

Answer 7

Lisa Thank you for explaining 🙏

Answer 8

Saurabh Kumar Yadav my apologies on the comment about the downvote. My post was downvoted at the time I made the comment. I assumed that was you since no others had posted. And after I suggested it be removed in my post to you it was removed (assuming you responded to my comment, I edited out my comment about the downvote). It must have been someone else. Again, my apologies for assuming it was you. I see now it wasn't as I have no reason to doubt your honesty.

Up or downvotes are not a big deal to me. I just mention it to encourage users to opine in a constructive comment so that we all can learn. Thanks for speaking up and continuing the conversation.