# Function std::iter::repeat1.0.0 [−] [src]

`pub fn repeat<T>(elt: T) -> Repeat<T> where    T: Clone, `

Creates a new iterator that endlessly repeats a single element.

The `repeat()` function repeats a single value over and over and over and over and over and 🔁.

Infinite iterators like `repeat()` are often used with adapters like `take`, in order to make them finite.

# Examples

Basic usage:

```use std::iter;

// the number four 4ever:
let mut fours = iter::repeat(4);

assert_eq!(Some(4), fours.next());
assert_eq!(Some(4), fours.next());
assert_eq!(Some(4), fours.next());
assert_eq!(Some(4), fours.next());
assert_eq!(Some(4), fours.next());

// yup, still four
assert_eq!(Some(4), fours.next());Run```

Going finite with `take`:

```use std::iter;

// that last example was too many fours. Let's only have four fours.
let mut four_fours = iter::repeat(4).take(4);

assert_eq!(Some(4), four_fours.next());
assert_eq!(Some(4), four_fours.next());
assert_eq!(Some(4), four_fours.next());
assert_eq!(Some(4), four_fours.next());

// ... and now we're done
assert_eq!(None, four_fours.next());Run```