Kotlin program of using throw keyword

Example 1:

// Main Function
fun main(args: Array<String>) {	
	ThrowDemo("Hello, world!")
	ThrowDemo("Hello!")
}

// ThrowDemo() function to check 
// whether string's lenght is 
// equal to or greater than 8
fun ThrowDemo(str: String) {
	// Comparing the lenght of the string
	if (str.length < 8)
		throw ArithmeticException("The string is too short.")
	else
		println("The string lenght is >=8.")
}

Output:

The string lenght is >=8.
Exception in thread "main" java.lang.ArithmeticException: The string is too short.
 at FileKt.ThrowDemo (File.kt:13) 
 at FileKt.main (File.kt:4) 
 at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (:-2) 

Example 2:

fun main(args: Array<String>) {
    print("Enter the user name: ")
    val user_name = readLine()

    try{
        if (user_name == "alex"){
            throw Exception("$user_name don't have an access!")
        }
        else
        {
            println("Welcome! $user_name. You're In.")
        }
    }
    catch (exp: Exception){
        println("Exception: " + exp.message)
    }
}

Output:

Run 1:
Enter the user name: alex
Exception: alex don't have an access!

Run 2:
Enter the user name: shivang
Welcome! shivang. You're In.