Earlier in the chapter, we looked at how one could write code that simulates the making of a pizza. The code looked like this:

print("Flattening the dough to form a round pizza ")
print("Adding some tomato sauce ")
print("Adding some mozzarella cheese ")
print("Adding some spicy pepperoni ")
print("Preparing the pizza in the oven ")
print("Done! Delicious pizza ready to be eaten ")

We discussed how this will scale if one would like to make many pizzas and the issues associated with that. Let's now look at how we can solve this by abstracting the preceding code using a function.

Go ahead and create a new Xcode playground and type in the preceding code:

The first thing we can do is to move our lines of code into a function body. Let's name our function makePizza for now. The function shouldn't take in any parameters and it will not return anything:

func makePizza() {
    print("Flattening the dough to form a round pizza ")
    print("Adding some tomato sauce ")
    print...