Perfect numbers: Difference between revisions

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@@ Line 366: / Line 366: @@
 void main() {
-    writeln(filter!isPerfectNumber(iota(33_550_337)));
+    iota(10_000).filter!isPerfectNumber().writeln();
 }</lang>
+{{out}}
-Output:
+<pre>[6, 28, 496, 8128]</pre>
+With a iota(33_550_337) it outputs:
 <pre>[6, 28, 496, 8128, 33550336]</pre>
 ===Functional Style===
+Same output.
 <lang d>import std.stdio, std.algorithm, std.range;
-bool isPerfect(in int n) {
+bool isPerfect(in int n) /*pure nothrow*/ {
-    return n == reduce!((s, i) => n % i ? s : s+i)(iota(1, n-1));
+    return n == iota(1, n - 1).reduce!((s, i) => n % i ? s : s + i)();
 }
 void main() {
-    writeln(filter!isPerfect(iota(3, 10_000)));
+    iota(3, 10_000).filter!isPerfect().writeln();
 }</lang>
-Output:
-<pre>[6, 28, 496, 8128]</pre>
 =={{header|E}}==