diff --git a/3-Operators/2-Comparison.ipynb b/3-Operators/2-Comparison.ipynb
index 2a3687db252a37fdd1a124ef00a00aac8937d0a7..5b593ac8d33fbfbda6caccca5d4f71ed139a6d43 100644
--- a/3-Operators/2-Comparison.ipynb
+++ b/3-Operators/2-Comparison.ipynb
@@ -457,6 +457,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "// What the operator< would look like if we wrote it ourselves:\n",
+    "\n",
     "bool operator<(const Rational& lhs, const Rational& rhs)\n",
     "{\n",
     "    if !(toolbox1.Nscrewdriver_ == toolbox2.Nscrewdriver_)\n",
diff --git a/3-Operators/5-Functors.ipynb b/3-Operators/5-Functors.ipynb
index 0cf05ec0d72a3c321dfbaab30110bbf12e533ba8..b27f32aa7d3302c3046f8e6eeda815496f742300 100644
--- a/3-Operators/5-Functors.ipynb
+++ b/3-Operators/5-Functors.ipynb
@@ -81,7 +81,7 @@
     "    LinearFunction Double(2);\n",
     "    LinearFunction Triple(3);\n",
     "\n",
-    "    for (double value : values)\n",
+    "    for (int value : values)\n",
     "        std::cout << value << \"\\t\" << Double(value) << \"\\t\" << Triple(value) << std::endl;\n",
     "}"
    ]