padEnd

fun CharSequence.padEnd(length: Int, padChar: Char = ' '): CharSequence(source)

fun main() {
    val word = "Kotlin"

    // Pad with spaces to a total length of 10
    val paddedWithSpaces = word.padEnd(10)
    println(">$paddedWithSpaces<") // prints 'Kotlin    '

    // Pad with hyphens to a total length of 10
    val paddedWithHyphens = word.padEnd(10, '-')
    println(">$paddedWithHyphens<") // prints 'Kotlin----'
}