Many of the Python functions we have used, such as the math functions, produce return values. But the functions we’ve written are all void: they have an effect, like printing a value or moving a turtle, but they don’t have a return value. In this chapter you will learn to write ...
By the way, Python provides a built-in function called abs that computes absolute values.Exercise 1 Write a compare function that returns 1 if x > y, 0 if x == y, and -1 if x < y. 6.2 Incremental developmentAs you write larger functions, you might find yourself spending more tim...