Question

How to extract the beginning of a string (prefix) in Swift

Answer 1

import Foundation

func extractPrefix(from str: String, lengthOfPrefix: Int) -> String {
    // Extract the prefix
    let prefix = String(str.prefix(lengthOfPrefix))
    
    return prefix
}

let str = "Swift Programming"
let lengthOfPrefix = 4 // Length of the prefix you want to extract

let prefix = extractPrefix(from: str, lengthOfPrefix: lengthOfPrefix)

print("Prefix: \(prefix)")




/*
run:

Prefix: Swif

*/

 

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