Swift Array Programming Exercises: Check if a given array of integers contains a 3 next to a 3 or a 5 next to a 5, but not both

Last update on June 14 2025 05:35:47 (UTC/GMT +8 hours)

Write a Swift program to check if a given array of integers contains a 3 next to a 3 or a 5 next to a 5, but not both.

Pictorial Presentation:

Sample Solution:

Swift Code:

func num35(array_nums: [Int]) -> Bool{
    var num_3 = false
    var num_5 = false
    
    for x in 0..<array_nums.count-1 {
        if array_nums[x] == 3 && array_nums[x+1] == 3 
        {
            num_3 = true
        } 
        else if array_nums[x] == 5 && array_nums[x+1] == 5 
        {
            num_5 = true
        }
    }
    
    return (num_3 && !num_5) || (!num_3 && num_5)
}

print(num35(array_nums: [1, 3, 3])) 
print(num35(array_nums: [5, 5, 1]))  
print(num35(array_nums: [5, 5, 1, 3, 3])) 
 

Sample Output:

true
true
false

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