Pattern / "problem solving"

Bintang.kt

fun main(args: Array<String>) = bintang(4)

fun bintang(n: Int) {
    for (i in n downTo 0) printBintang(n, i)
    for (i in 1..n) printBintang(n, i)
}

fun printBintang(n: Int, rentang: Int) {
    space(n - rentang)
    
    if (rentang == 0) {
        println('*')
    } else {
    	print('*')
    	space(rentang * 2 - 1)
    	println('*')
    }
}

fun space(n: Int) {
    for (i in 1..n) print(' ')
}