Loops/With multiple ranges: Difference between revisions

Using a series of individual for loops:

<syntaxhighlight lang="kotlin">// Version 1.2.70

System.out.printf("sum = % ,d\n", sum)

System.out.printf("prod = % ,d\n", prod)

}</syntaxhighlight>

{{output}}

<pre>

sum = 348,173

prod = -793,618,560

</pre>

The following version does it in a similar way to PL/I and Algol-60, i.e. without defining a function to process the loop, using a _single_ loop, and without creating a list from which to iterate:

<syntaxhighlight lang="kotlin">

import kotlin.math.abs

import kotlin.math.pow

private infix fun Int.`^`(exponent: Int): Int = toDouble().pow(exponent).toInt()

fun main() {

var prod = 1

var sum = 0

val x = 5

val y = -5

val z = -2

val one = 1

val three = 3

val seven = 7

val p = 11 `^` x

for (j in sequenceOf(

-three..(3 `^` 3) step three,

-seven..seven step x,

555..550-y,

22 downTo -28 step three,

1927..1939,

x downTo y step -z,

p..p + one

).flatten()) {

sum += abs(j)

if (abs(prod) < (2 `^` 27) && j != 0) prod *= j

}