Kotlin Variables

val gives days the value 7. println shows the stored number.

fun main() {
    val days = 7
    println(days)
}

The two println lines show count before and after the change. The count grows from 1 to 2 in the output.

fun main() {
    var count = 1
    println(count)
    count = 2
    println(count)
}

Each name holds its own value. Each println shows one stored value on its own line.

fun main() {
    val score = 10
    var level = 1
    println(score)
    println(level)
}

The last line tries to give limit a new value. The compiler stops and names val in its error.

fun main() {
    val limit = 5
    limit = 6
}

fun main() {
    var score = 10
    println(score)
    score = 15
    println(score)
}