fun main(args:Array<String>) { var n:Int = readLine()!!.toInt() var a:Array<Int> = Array<Int>(n){readLine()!!.toInt()} for (num in a){ } var k:Int = readLine()!!.toInt() for(num1 in 0..n){ if(a[num1]==k){ print(num1) return } } }

Please use triple backquotes around your code for better readability