Introduction¶

Computers are often used to automate repetitive tasks. Repeating identical or similar tasks without making errors is something that computers do well and people do poorly.

Repeated execution of a sequence of statements is called iteration. Because iteration is so common, Python provides several language features to make it easier. We’ve already seen the for statement in a previous chapter. This is a very common form of iteration in Python. In this chapter we are going to look at the while statement — another way to have your program do iteration.