print() vs println()

Using print()

print() writes text to standard output without adding a newline afterward, so the next thing printed continues right where the previous output left off.

Example: Using print()

fun main() {
    print("Hello, ")
    print("World!")
    print(" No newline between these.")
}

Using println()

println() behaves like print() but appends a newline character at the end, so each call starts fresh on the next line of output.

Example: Using println()

fun main() {
    println("First line")
    println("Second line")
    println("Third line")
}

Printing Non-String Values

Both print() and println() accept numbers, booleans, and other types directly -- Kotlin converts them to their string representation automatically before printing.

Example: Printing Non-String Values

fun main() {
    println(42)
    println(3.14)
    println(true)
}

Mixing print() and println()

Combining both lets you build a single line piece by piece with print() and then finish it with a println() call, which is useful for formatting output that has multiple parts.

Note: Overusing print() for multi-part lines can get confusing -- string templates (covered later) are often clearer.

Example: Mixing print() and println()

fun main() {
    print("Score: ")
    print(95)
    println("/100")
    println("Done!")
}