What is the difference between i++ and ++i ?

Good question! The difference between i++ and ++i lies in how they increment the value of i and when the increment takes place.

i++ is called the post-increment operator. This means that the current value of i is used in the expression, and then it is increased by 1 after that.

For example, if i is 5, then using i++ in an expression would first use 5, and then i becomes 6 afterwards.

#include 

int main() {

  int i = 5;

  printf("%d", i++);  // Output: 5
  
  printf("\n%d", i);  // Output: 6

  return 0;
}

On the other hand, ++i is called the pre-increment operator. This means i is incremented by 1 first, and then the new value is used in the expression.

So if i is 5, ++i would increase it to 6 first, and the expression would use this new value (6).

#include 

int main() {

  int i = 5;

  printf("%d", ++i);  // Output: 6

  printf("\n%d", i);  // Output: 6

  return 0;
}

To summarize:

• i++: Use current value, then increment.

• ++i: Increment first, then use new value.

Hope this helps! If you have any more questions, feel free to ask.