i want to read strings from multiple lines , \\s+“.toRegex() would not help as it merely reads one or more whitespaces but not multiple lines. how would u approach ?:

val lines = readln().split("\\s+".toRegex()).map { it }.toMutableList()
println(lines.joinToString(" ,   "))

If you want to read multiple lines from stdin then

readln()

is a bad choice because as the doc states, it terminates upon LF/CRLF. Therefore, you either have to read the lines in a loop or use something like

val scanner = Scanner(System.`in`)
val readText = scanner.nextLine()

How many lines do you want to read? Or, what is your terminating condition?

As much as available, could me anywhere between 2 to 15

In that case, it's just:

val lines = System.`in`.reader().readLines()