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How to check if a range is empty in Swift
Theodore Kelechukwu OnyejiakuOverview
We can check if a range is empty in Swift by using the isEmpty property of a Range instance. It returns a boolean true or false indicating if the range is empty or not.
Syntax
range.isEmpty
Return value
The value returned is a boolean variable. If the range is empty, true is returned. Otherwise, it returns false.
Code
// create some ranges let range1 = 1 ..< 6 // 1 to 5 let range2 = 10 ..< 50 // 10 to 49 let range3 = 0 ..< 0 // empty let range4 = 3 ..< 3 // empty // check ranges if they are empty print(range1.isEmpty) // false print(range2.isEmpty) // false print(range3.isEmpty) // true print(range4.isEmpty) // true
Check if some ranges are empty in Swift
Explanation
- Line 2–5: We create some ranges.
- Line 8–11: We check if each range is empty using the
isEmptyproperty. Then, we print the result to the console.
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