ЯсноПонятно24

package main

import ( "fmt" "os" "bufio" )

func LineByNum(inputFilename string, lineNum int) string { file, err := os.Open(inputFilename) if err != nil { fmt.Println("Error opening file:", err) return "" } defer file.Close()

scanner := bufio.NewScanner(file)
currentLine := 0
for scanner.Scan() {
	currentLine++
	if currentLine == lineNum {
		return scanner.Text()
	}
}

return ""

}

func main() { inputFilename := "input.txt" lineNum := 3 line := LineByNum(inputFilename, lineNum) if line == "" { fmt.Println("Line not found") } else { fmt.Println("Line", lineNum, ":", line) } }