Swift Basic Programming Exercise: Count the number of times that two 7's are next to each other in a given array of integers

Swift Basic Programming: Exercise-27 with Solution

Write a Swift program to count the number of times that two 7's are next to each other in a given array of integers.

Pictorial Presentation:

Sample Solution:

Swift Code:

func array77(_ input: [Int]) -> Int {
    var ctr = 0
        for (index, number) in input.enumerated() {
        let nextIndex = index + 1
        
        if nextIndex < input.endIndex && number == 7 && (input[nextIndex] == 7 ) 
        {
            ctr += 1
        }
    }
    return ctr
}

print(array77([7, 7, 3]))
print(array77([7, 7, 2, 7, 7]))
print(array77([7, 5, 2, 7]))

Sample Output:

1
2
0

Swift Programming Code Editor:

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