For loops

We will often want to perform the same task on a number of different items, such as cleaning every column in a data set. One effective way to do this is through “for loops”. Earlier in this book we learned how to scrape the recipe website All Recipes. ¹ We did so for a single recipe. If we wanted to get a feast's worth of recipes, typing out each recipe would be slow, even with the function we made in Section 20.3. In this chapter we will use a for loop to scrape multiple recipes very quickly.