+    num = 234;
+   //?????  why 1?
+   // assertEquals( 0, BitUtil.ntz(num) );
+   // assertEquals( 0, BitUtil.ntz2(num) );
+   // assertEquals( 0, BitUtil.ntz3(num) );
+  }

Any idea why the answer is 1? the docs say "(only works for x!=0)"

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