Swift String Exercises: Create a new string made of the first and last n chars from a given string

Last update on June 14 2025 13:05:20 (UTC/GMT +8 hours)

Write a Swift program to create a new string made of the first and last n chars from a given string. The string length will be at least n.

Pictorial Presentation:

Sample Solution:

Swift Code:

func twice_n_char(_ input: String, _ n: Int) -> String {
    let part1 = String(input.characters.prefix(n))
    let part2 = String(input.characters.suffix(n))
    
    return part1 + part2
}
print(twice_n_char("Python", 2))
print(twice_n_char("Swift Examples", 3))
print(twice_n_char("Swift Examples", 1))

Sample Output:

Pyon
Swiles
Ss

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