Data commit

Task/Population-count/Kotlin/population-count.kotlin

@@ -0,0 +1,40 @@
+// version 1.0.6
+
+fun popCount(n: Long) = when {
+    n < 0L -> throw IllegalArgumentException("n must be non-negative")
+    else   -> java.lang.Long.bitCount(n)
+}
+
+fun main(args: Array<String>) {
+    println("The population count of the first 30 powers of 3 are:")
+    var pow3 = 1L
+    for (i in 1..30) {
+        print("${popCount(pow3)} ")
+        pow3 *= 3L
+    }
+    println("\n")
+    println("The first thirty evil numbers are:")
+    var count = 0
+    var i = 0
+    while (true) {
+        val pc = popCount(i.toLong())
+        if (pc % 2 == 0) {
+           print("$i ")
+           if (++count == 30) break
+        }
+        i++
+    }
+    println("\n")
+    println("The first thirty odious numbers are:")
+    count = 0
+    i = 1
+    while (true) {
+        val pc = popCount(i.toLong())
+        if (pc % 2 == 1) {
+            print("$i ")
+            if (++count == 30) break
+        }
+        i++
+    }
+    println()
+}