Swift String Exercises: Create a new string of any length from a given string where the last two characters are swapped

Last update on June 14 2025 13:04:55 (UTC/GMT +8 hours)

Write a Swift program to create a new string of any length from a given string where the last two characters are swapped, so 'abcde' will be 'abced'.

Pictorial Presentation:

Sample Solution:

Swift Code:

func string_swap(_ a:String) -> String {
    var str1 = a
    
    let last_char = str1.characters.removeLast()
    let second_to_lastchar = str1.characters.removeLast()
    
    str1.append(last_char)
    str1.append(second_to_lastchar)
    
    return str1
}
print(string_swap("abcde"))
print(string_swap("12345"))

Sample Output:

abced
12354

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