Go uses one loop keyword, for, with several forms: a three-part loop for counted iteration, a condition-only loop, or an infinite loop. section 3.5 section 3.1.4
Choose the form that matches the collection or stopping condition:
- Use `for i := 0; i < limit; i++` for indexed, counted work. section 3.1.4
- Use `for condition()` when iteration continues while a condition remains true. section 3.5
- Use `for index, value := range slice` or `range map` to visit collection elements, indexes, keys, and values. section 3.5
- Replace an unused index or value with `_`; use `for index := range slice` when only indexes are needed. section 3.5
Display books with range
A `displayBooks` function ranges over a slice and prints each title and author: `for _, book := range books { fmt.Println("-", book.Title, "by", book.Author) }`. The resulting function can be called from `main` and checked with an example test. section 3.3
Listing 3.19 bookworms.go: displayBooks
// displayBooks prints out the titles and authors of a list of books
func displayBooks(books []Book) {
for _, book := range books {
fmt.Println("-", book.Title, "by", book.Author)
}
}
Inspect the complete `displayBooks` implementation, including range iteration and formatted output. section 3.3
