# PartialRangeUpTo

A partial half-open interval up to, but not including, an upper bound.

`@frozen struct PartialRangeUpTo<Bound> where Bound : Comparable`

## Overview

You create `PartialRangeUpTo`

instances by using the prefix half-open range operator (prefix `..<`

).

`let upToFive = ..<5.0`

You can use a `PartialRangeUpTo`

instance to quickly check if a value is contained in a particular range of values. For example:

```
upToFive.contains(3.14) // true
upToFive.contains(6.28) // false
upToFive.contains(5.0) // false
```

You can use a `PartialRangeUpTo`

instance of a collection’s indices to represent the range from the start of the collection up to, but not including, the partial range’s upper bound.

```
let numbers = [10, 20, 30, 40, 50, 60, 70]
print(numbers[..<3])
// Prints "[10, 20, 30]"
```