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How to get all the possible Substrings of a String in Swift - Step by Step Examples

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How to get all the possible Substrings of a String in Swift ?

Answer

To get all possible substrings of a string in Swift, you can use nested loops to iterate through each combination of start and end indices.

✐ Examples

1 All Substrings of 'Hello'

In this example,

We create a variable named str with a value of 'Hello'.
We initialize an empty array named substrings to store all substrings.
We use nested loops to iterate through each possible start and end index combination.
For each combination, we extract the substring using subscript notation and add it to the substrings array.
Finally, we print the substrings array.

Swift Program

let str = "Hello"
var substrings: [String] = []
for i in 0..<str.count {
    for j in i + 1...str.count {
        let substring = str[str.index(str.startIndex, offsetBy: i)..<str.index(str.startIndex, offsetBy: j)]
        substrings.append(String(substring))
    }
}
print("All substrings:", substrings)

Output

All substrings: ["H", "He", "Hel", "Hell", "Hello", "e", "el", "ell", "ello", "l", "ll", "llo", "l", "lo", "o"]

Summary

In this tutorial, we learned How to get all the possible Substrings of a String in Swift language with well detailed examples.

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