iOS
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Swift 6
Kodebits Day 65: Custom Subscript
Jul 27 2026
Practice subscripts with a short swift challenge.
What is the output?
struct Grid {
var data = [1, 2, 3, 4]
subscript(i: Int) -> Int {
return data[i] * 10
}
}
let grid = Grid()
print(grid[1])
print(grid[3])
Try it in the online Swift Playground →
[spoiler title="Solution"]
Answer:
20 40
Explanation:
Subscripts provide custom bracket-notation access with computed values.
[/spoiler]