JuniorTheoryCommon

What happens when you build and run this program?

KOTLIN

fun setAge(age: Int): Int {
    require(age >= 0) { "age < 0" }
    return age
}

fun main() {
    println(setAge(5))
    println(setAge(-1))
}

Prints 5, then an IllegalArgumentException: age < 0

Expecting an IllegalStateException: mixing up require and check. require guards arguments and throws IllegalArgumentException; check guards state.
Expecting nothing to be printed: an exception at run time stops the program at its own line, and 5 from the first call is already on the screen.

JuniorTheoryCommon

KOTLIN

fun setAge(age: Int): Int {
    require(age >= 0) { "age < 0" }
    return age
}

fun main() {
    println(setAge(5))
    println(setAge(-1))
}

Prints 5, then an IllegalArgumentException: age < 0

Expecting an IllegalStateException: mixing up require and check. require guards arguments and throws IllegalArgumentException; check guards state.
Expecting nothing to be printed: an exception at run time stops the program at its own line, and 5 from the first call is already on the screen.