Floyd's triangle in Kotlin

FloydsTriangle.kt

/*
Floyd's triangle lists the natural numbers in a right triangle aligned to the left where
- the first row is 1
- successive rows start towards the left with the next number followed by successive naturals listing one more number than the line above.

The first few lines of a Floyd triangle (n=5) looks like this:


 1
 2  3
 4  5  6
 7  8  9 10
11 12 13 14 15
Task
- Write a program using a function to generate and display the first n lines of a Floyd triangle (where n is the number of rows).
- Ensure that the numbers line up in vertical columns as shown in the example above.
*/

fun main(args: Array<String>) {
    floydTriangle(5)
}

fun floydTriangle(n: Int) {
    var num = 1
    for (i in 0..n-1) {
        for (y in n-i..n ) {
            print("${num++} 	\t")
        }
        println()
    }
}