Printing Output

println prints a value and ends the line; print prints without ending the line.

Example

fun main() {
    println("Hello")
    print("Same ")
    print("line")
    println()
    println(42)
    println(3.5)
    println(true)
    println(listOf(1, 2, 3))
    println("A" + "B")
}

Expected output

Hello
Same line
42
3.5
true
[1, 2, 3]
AB

• println() with nothing just ends the current line.
• Any value can be printed: numbers, true/false, and collections, which print in square brackets.

To print several values on one line, build a single string with a string template — covered in the Strings lesson:

fun main() {
    val city = "Oslo"
    val temp = 21
    println("$city: $temp°C")
}

Oslo: 21°C

Practice

Print Loading... and then done on the same line, followed by a new line.

fun main() {
    print("Loading...")
    println("done")
}