diff --git a/python-cheatsheet.ipynb b/python-cheatsheet.ipynb
index 12d520e..e939bbb 100644
--- a/python-cheatsheet.ipynb
+++ b/python-cheatsheet.ipynb
@@ -333,6 +333,122 @@
    "outputs": [],
    "source": []
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## if/else"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# check if a word is in a list\n",
+    "words = ['hello', 'language', 'weaving']\n",
+    "word = 'quilting'\n",
+    "if word in words:\n",
+    "    print(f'{word} is in the list!')\n",
+    "else:\n",
+    "    print(f'{word} is NOT in the list!')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# check if a letter is in a word\n",
+    "words = ['hello', 'language', 'weaving']\n",
+    "letter = 'a'\n",
+    "for word in words:\n",
+    "    if letter in word:\n",
+    "        print(f'the letter \"{letter}\" is in the word \"{word}\"!')\n",
+    "    else:\n",
+    "        print(f'the letter \"{letter}\" is NOT in the word \"{word}\"!')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# check if a word is in a sentence\n",
+    "sentences = [\n",
+    "    'Software and language are intrinsically related, since software may process language, and is constructed in language.', \n",
+    "    'Yet language means different things in the context of computing: formal languages in which algorithms are expressed and software is implemented, and in so-called “natural” spoken languages.', \n",
+    "    'There are at least two layers of formal language in software: programming language in which the software is written, and the language implemented within the software as its symbolic controls.'\n",
+    "]\n",
+    "word = 'programming'\n",
+    "for sentence in sentences:\n",
+    "    print('---')\n",
+    "    if word in sentence:\n",
+    "        print(f'the word \"{word}\" is in the sentence \"{sentence}\"!')\n",
+    "    else:\n",
+    "        print(f'the word \"{word}\" is NOT in the sentence \"{sentence}\"!')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# check if a word ends with \"ing\"\n",
+    "words = ['hello', 'language', 'weaving']\n",
+    "for word in words:\n",
+    "    if word.endswith('ing'):\n",
+    "        print(f'YES, the word \"{word}\" ends with \"-ing\"!')\n",
+    "    else:\n",
+    "        print(f'NO, the word \"{word}\" DOES NOT end with \"-ing\"!')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -438,20 +554,9 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 83,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "dict_keys(['word'])"
-      ]
-     },
-     "execution_count": 83,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "dict.keys()"
    ]