JuniorTheoryCommon

What does the program print?

KOTLIN

fun main() {
    val n = try {
        "42a".toInt()
    } catch (e: NumberFormatException) {
        -1
    }
    println(n)
}

-1

Expecting 42: thinking toInt() keeps the digits before the letter. It rejects the whole text and throws NumberFormatException, so the catch value is used.
Expecting a compile error: thinking try cannot be assigned. Like if, try is an expression, and its value is the last line of the block that ran.

JuniorTheoryCommon

KOTLIN

fun main() {
    val n = try {
        "42a".toInt()
    } catch (e: NumberFormatException) {
        -1
    }
    println(n)
}

-1

Expecting 42: thinking toInt() keeps the digits before the letter. It rejects the whole text and throws NumberFormatException, so the catch value is used.
Expecting a compile error: thinking try cannot be assigned. Like if, try is an expression, and its value is the last line of the block that ran.