Challenge LinkedInLearning#1 - Factorial Challenge

Jupyter Notebook .ipynb with the step-by-step solution I found developing a factorial function.
- Original Code Stub
- Add Test Cases
- Check for Integers
- Add "base case" elif/else combo
- Add return values & factorial formula

Author: hijrdn

Solved-Challenges/02_08 Challenge Solved.ipynb

@@ -0,0 +1,169 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "27900b66-b4c4-4f33-aadf-c6cd03e62916",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "</> Code Challenge: Factorials"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "f2b7798c-1d83-47e6-9b90-b1f5c4ac989e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def factorial(num):\n",
+    "    # Your code goes here\n",
+    "    pass"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "6617f97f-b644-4d05-8f76-64dcd32b1010",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "None\n",
+      "None\n",
+      "None\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Step 1 - print function test cases\n",
+    "def factorial(num):\n",
+    "    return None\n",
+    "\n",
+    "print(factorial(0))\n",
+    "print(factorial(5))\n",
+    "print(factorial('spam spam spam'))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "0493e97c-190a-4b06-b917-a7220288f21c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Is int\n",
+      "Is int\n",
+      "Not int\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Step 2 - check number for being an integer\n",
+    "def factorial(num):\n",
+    "    if not isinstance(num, int) or num < 0:\n",
+    "        return \"Not int\"\n",
+    "        \n",
+    "    else:\n",
+    "        return \"Is int\"\n",
+    "        \n",
+    "print(factorial(0))\n",
+    "print(factorial(5))\n",
+    "print(factorial('spam spam spam'))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "298ea029-2867-4198-8d91-fac7fae737c7",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Is Int\n",
+      "Is Int - do factorial calc\n",
+      "Not Int\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Step 3 - add elif for simple cases\n",
+    "def factorial(num):\n",
+    "    if not isinstance(num, int) or num < 0:\n",
+    "        return \"Not Int\"\n",
+    "        \n",
+    "    elif num == 0 or num ==1:\n",
+    "        return \"Is Int\"\n",
+    "        \n",
+    "    else:\n",
+    "        return \"Is Int - do factorial calc\"\n",
+    "        \n",
+    "print(factorial(0))\n",
+    "print(factorial(5))\n",
+    "print(factorial('spam spam spam'))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "eb34c395-03cc-4c6c-b419-6d52454df2fc",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1\n",
+      "120\n",
+      "None\n"
+     ]
+    }
+   ],
+   "source": [
+    "#Step 3 - add return values & equation for a factorial\n",
+    "def factorial(num):\n",
+    "    if not isinstance(num, int) or num < 0:\n",
+    "        return None\n",
+    "        \n",
+    "    elif num == 0 or num ==1:\n",
+    "        return 1\n",
+    "        \n",
+    "    else:\n",
+    "        return num * factorial(num - 1)\n",
+    "        \n",
+    "print(factorial(0))\n",
+    "print(factorial(5))\n",
+    "print(factorial('spam spam spam'))"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}