JuniorTheoryCommon

What does the program print (lines separated by spaces)?

KOTLIN

fun main() {
    val n = 5
    val label = if (n > 3) {
        println("big")
        "B"
    } else {
        "S"
    }
    println(label)
}

big B

Expecting only B: an if used as a value still runs every line of the chosen block, so println("big") prints before "B" becomes the value.
Expecting both blocks to run: only the block whose condition is true runs, and its last expression, here "B", becomes the value of the if.

JuniorTheoryCommon

KOTLIN

fun main() {
    val n = 5
    val label = if (n > 3) {
        println("big")
        "B"
    } else {
        "S"
    }
    println(label)
}

big B

Expecting only B: an if used as a value still runs every line of the chosen block, so println("big") prints before "B" becomes the value.
Expecting both blocks to run: only the block whose condition is true runs, and its last expression, here "B", becomes the value of the if.