How do loops improve programming efficiency?

Answer 1

They save duplicating code. That also means that once you get the loop code correct you don't have to test other duplicated copies of it for errors.

It also makes it easier to structure the program because the details of the loop processing are in one place.

They shorten the program so that it is easier to scan when bench checking.

Answer 2

because they allow resuablity by allowing you to execute the same functionality a number of times rather than duplicating the same code n times in n different places