Code Snippet: Print a File Line-by-Line

Within these castle walls be forged Mavens of Computer Science ...

— Merlin, The Coder

Swift

import Foundation

// Determine the file name
let filename = "main.swift"

// Read the contents of the specified file
let contents = try! String(contentsOfFile: filename)

// Split the file into separate lines
let lines = contents.split(separator:"\n")

// Define a variable to track the current line number
// Iterate over each line and print the line preceded
// by the line number
var lineNumber = 1
for line in lines {
    print("\(lineNumber): \(line)")
    lineNumber += 1
}