Arizona State University (ASU) CSE100 Principles of Programming with C++ Midterm 1 Practice Exam

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Which of the following statements correctly describes the expression "i++"?

It increments the value of i before being used in the expression

It increments the value of i after being used in the expression

The expression "i++" is known as the post-increment operator in C++. This operator first returns the current value of the variable `i`, and then increments `i` by 1. Therefore, when you use "i++" in an expression, the value of `i` that is returned is the value prior to the increment, and only after that value is used does `i` get increased. This behavior is fundamental to understanding how post-increment works.

For instance, if `i` is initially 3 and the expression `j = i++` is executed, `j` would be assigned the value 3, and then `i` would be incremented to 4. This emphasizes the order of operations where the value is taken before the increment occurs, aligning perfectly with the description provided by the correct answer.

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It does not increment the value of i

It reassigns the value of i to a new value

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