Computer scienceProgramming languagesKotlinControl flowExceptionsHow to work with exceptions

Avoiding NPEs. Null safety

Theory

Elvis throwing exceptions

Report a typo

Try to read a line. If there is no line, throw an IllegalStateException(). If there is a line, output Elvis says: $line.

Use the ?: throw construction to solve this task.

Sample Input 1: 

hairstyle

Sample Output 1: 

Elvis says: hairstyle
Write a program in Kotlin
fun main() {
readLine() // you need to add something
}
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