Swift String Exercises: Insert a given string to another given string where the second string will be in the middle of the first string

Last update on June 14 2025 13:05:12 (UTC/GMT +8 hours)

Write a Swift program to insert a given string to another given string where the second string will be in the middle of the first string.

Pictorial Presentation:

Sample Solution:

Swift Code:

func insert_string(_ str1: String, _ str2: String) -> String {
    var current_index = str1.startIndex
    let char1: Character = str1[current_index]
    var result = str1
    
    while char1 == str1[current_index] {
        current_index = str1.index(after: current_index)
    }
    
    result.insert(contentsOf: str2.characters, at: current_index)
    
    return result
}

print(insert_string("<>", "Swift"))
print(insert_string("<>>", "Swift"))
print(insert_string("[]", "Swift"))

Sample Output:

<Swift>
<Swift>>
[Swift]

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