In Swift, we can use the **`...` range operator** to create a range of values between two numeric values. It is used  to check if a value is present in the range or to create a range of values.

# Closed range  

```
a...b
```

A **closed range** includes all the values in the interval from the lower bound `a` to the upper bound `b` (including the upper bound `b`).

# Example  

import Swift

let numbers = 0...5
print(numbers)

print( "Checking if 3 is present in the range ",numbers.contains(3))
print( "Checking if 10 is present in the range ",numbers.contains(10))
print( "Checking if 5 is present in the range ",numbers.contains(5))


In the code above, we have: 

* Used the `...` range operator to create a #key# closed range:  An interval of values from a lower bound to upper bound (including upper bound). #key# from `1 to 5(included)`. Now, the `numbers` will contain the values of `1,2,3,4,5`. 

* Checked if the `3` and `5` are present in the `numbers` range.

# Use closed range to slice array  

import Swift

var fruits = ["apple", "orange", "banana", "watermelon", "Avocado"]
print("Tha fruits array is \(fruits)");

var slicedFruits = fruits[0...2]
print("\nTha slicedFruits from index 0 to 2 is \(slicedFruits)");


In the above code, we have created a fruits array with five elements. Then, we used the `...` range operator to slice the `fruits` array from index `0 to 2`.

# Use closed range in `for` loop

import Swift

var numbers = [1,2,3,4,5]
print("The array is :-  \(numbers)")

for index in 0...numbers.count-1 {
    print(numbers[index])
}

In the `for` loop above, we have used the closed range as: 
```
0...numbers.count - 1
```

This will loop from index `0 to numbers.count-1`.

# Use closed range in `if` condition

import Swift

if (0...5).contains(5) {
    print(" 5 is present in the range 0...5")
}

In the code above, we have:

* Created a closed range of `0...5`. 
* Checked if `5` is present in the range using the `if` statement. 

What is closed range in Swift?

Closed range in Swift includes values from the lower bound to the upper bound, used in loops, slicing arrays, and condition checks.

What is closed range in Swift?

Closed range

Example

Use closed range to slice array

Use closed range in for loop

Use closed range in if condition

Use closed range in `for` loop

Use closed range in `if` condition