Swift Basic Programming Exercise: Check if the first instance of "a" in a given string is immediately followed by another "a"

Last update on December 21 2024 10:30:08 (UTC/GMT +8 hours)

Write a Swift program to check if the first instance of "a" in a given string is immediately followed by another "a".

Pictorial Presentation:

Sample Solution:

Swift Code:

func double_a(_ input: String) -> Bool {
    let chars = input.characters
    var ans: Bool = false
    
    for i in chars {
        let found_Index = chars.index(of: i)
        let next_Index = chars.index(after: found_Index!)
        
        if i == "a" && chars[next_Index] == "a" 
        {
            ans = true
        }
    }
    return ans
}

print(double_a("abbcaad"))
print(double_a("ababab"))
print(double_a("aaaaa"))

Sample Output:

false
false
true

Swift Programming Code Editor:

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