LESSON 160 OF 415 · LOOPING OVER ARRAY INDICES

Top K Brands V3 - Max in Array in Swift

Practice

Many brands sell the same product, stored in two parallel arrays: ratings[i] is the rating of brands[i]. Find the highest-rated brand by scanning with a loop.

You start with:

        let brands = ["TechPro", "MegaCorp", "Quantum", "NeoByte", "Zenith"]
        let ratings = [4, 5, 3, 5, 4]

Build:

1. MegaCorp (5)

Rules:

Keep the position of the best brand so far in bestIndex, starting at 0, and scan the positions from 1 to the end with a loop.
Update bestIndex only on a strictly higher rating. If two brands share the top rating, the one listed first wins (MegaCorp at position 1, not NeoByte at position 3).
Format the winner as "1. Brand (rating)" and print it with print(...).

Walk the positions with for index in 1..<ratings.count { and compare each rating with the best one so far.

Swift puts any value into a string with interpolation: "\(value)".

        let brands = ["TechPro", "MegaCorp", "Quantum", "NeoByte", "Zenith"]
        let ratings = [4, 5, 3, 5, 4]

        var bestIndex = 0
        for index in 1..<ratings.count {
            if ratings[index] > ratings[bestIndex] {
                bestIndex = index
            }
        }
        print("1. \(brands[bestIndex]) (\(ratings[bestIndex]))")

STEP 1 OF 5

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Top K Brands V3 - Max in Array in Swift

Top K Brands V3 in Swift