What does the "++i" notation signify in C++?

The "++i" notation in C++ signifies pre-increment. When you use this notation, the variable "i" is incremented by 1 before its value is used in an expression. This means that if "i" is initially, for example, 5, using "++i" will first increase its value to 6 and then return that new value.

In contrast, if the notation were "i++", it would imply post-increment. In that case, the current value of "i" would be used in an expression first, and then "i" would be incremented afterwards.

Understanding pre-increment is important as it can affect the order of operations and the final outcome of expressions when variables are involved. Therefore, recognizing "++i" as pre-increment is essential for correctly predicting the behavior of your code in execution contexts.