Swift Array Programming Exercises: Test if every 3 that appears in a given array of integers is next to another 3

Swift Array Programming: Exercise-36 with Solution

Write a Swift program to test if every 3 that appears in a given array of integers is next to another 3.

Pictorial Presentation:

Sample Solution:

Swift Code:

func three_two(array_nums: [Int]) -> Bool {
    var x = 0
    while x < array_nums.count-1 {
        if array_nums[x] == 3 && array_nums[x+1] != 3
        {
            return false
        } 
        else if array_nums[x] == 3 && array_nums[x+1] == 3 
        {
            x += 1
        }
        x += 1
    }
    
    if array_nums[array_nums.count-1] == 2
    {
        return false
    }
    
    return true
}

print(three_two(array_nums: [4, 3, 3, 3]))
print(three_two(array_nums: [3, 1, 4]))
print(three_two(array_nums: [3, 3, 4, 3]))

Sample Output:

true
false
true

Swift Programming Code Editor:

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