1) This code calculates the sum of squares of all integers from `a` to `b` inclusive, where `a` and `b` are provided by the user. 2) Hint: The variable `sum` is not initialized before being used in the loop, which leads to undefined behavior. Hint: Consider what happens if the user inputs a value for `a` that is greater than `b`—the loop condition `i <= b` may not execute as intended.