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Task/Digital-root/Sidef/digital-root.sidef

@@ -0,0 +1,25 @@
+func digroot (r, base = 10) {
+    var root = r.base(base)
+    var persistence = 0
+    while (root.len > 1) {
+        root = root.chars.map{|n| Number(n, 36) }.sum(0).base(base)
+        ++persistence
+    }
+    return(persistence, root)
+}
+
+var nums = [5, 627615, 39390, 588225, 393900588225]
+var bases = [2, 3, 8, 10, 16, 36]
+var fmt = "%25s(%2s): persistance = %s, root = %2s\n"
+
+nums << (550777011503 *
+         105564897893993412813307040538786690718089963180462913406682192479)
+
+bases.each { |b|
+    nums.each { |n|
+        var x = n.base(b)
+        x = 'BIG' if (x.len > 25)
+        fmt.printf(x, b, digroot(n, b))
+    }
+    print "\n"
+}