```fun checkCust(accNo:Int):Int { for (x in 0 ...

# announcements

[Ashutosh Panda]

fun checkCust(accNo:Int):Int {
    for (x in 0 until 10) {


        return if (dataBase[x]?.accNo == accNo) {
            x
        } else {
            -1
        } 
    }

 }