Start with chapter 1's `tasks.tea`. We're going to replace the single title with a list and give each task a number. ## Put the titles in a list Replace the `title` binding with: ```tea const tasks = ["Learn Tea", "Build a CLI", "Take a break"] ``` Square brackets create a list. Since each element is a string, Tea infers `List[String]`. A list keeps its elements in order; the first item has index `0` when you access it directly. ## Print each title Replace the old output statement with: ```tea var number = 1 for title in tasks @println(`${number}. ${title}`) number = number + 1 end ``` `for title in tasks` binds each element to `title` in turn. The block closes with `end`. Indent the body by two spaces for readability; it is the `end` keyword that marks the block's boundary. We use `var` for `number` because it changes on each iteration. Its initial value is an `Int`. The counter starts at `1` because these numbers are for the person using the tool, even though list indexes start at `0`. Interpolation accepts numbers as well as strings, so there's no need to convert `number` before printing it. ## Run the program ```bash tea tasks.tea ``` ```text 1. Learn Tea 2. Build a CLI 3. Take a break ``` ## Complete checkpoint **`tasks.tea`** ```tea checkpoint="examples/tutorial/tasks/02-task-list/tasks.tea" const tasks = ["Learn Tea", "Build a CLI", "Take a break"] var number = 1 for title in tasks @println(`${number}. ${title}`) number = number + 1 end ``` ## Try it yourself Add a fourth task and print the total number of tasks after the loop.

Hint

Add another string inside the list's square brackets. After `end`, use `@len(tasks)` to get the list length: ```tea @println(`${@len(tasks)} tasks`) ```

You now have a collection and a loop. Next, each task will carry its own completion status. Read more: [lists and inferred types](/docs/types), [length and other built-ins](/reference/builtins).