updated code and renamed files

Author: K-Waks

1_Introduction.ipynb renamed to 1) introduction.ipynb

@@ -62,36 +62,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 1,
    "id": "c625d1e8",
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Hiii\n"
+      "Hiii 👋\n"
      ]
     }
    ],
    "source": [
-    "x = \"Hiii\"\n",
+    "x = \"Hiii 👋\"\n",
     "print(x)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 2,
    "id": "396bd3c1",
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "'Hiii'"
+       "'Hiii 👋'"
       ]
      },
-     "execution_count": 3,
+     "execution_count": 2,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -425,6 +425,84 @@
     "- Python uses a form of dynamic typing, sometimes called **duck typing**, where the type of a value is determined by the value itself. In other words, if it walks like a duck, it's a duck."
    ]
   },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "e5ae30d3",
+   "metadata": {},
+   "source": [
+    "## Using `input()` to get user input"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "9be7cb0b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Kevin\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "str"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "name = input(\"What's your name?\")\n",
+    "print(name)\n",
+    "type(name)"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "9c6035d2",
+   "metadata": {},
+   "source": [
+    "- Typecast to an `int` in order to get integer input, or a `float()` if you want decimals, etcetera."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "20781134",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "5\n"
+     ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "int"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "num = int(input(\"What your favorite number\"))\n",
+    "print(num)\n",
+    "type(num)"
+   ]
+  },
   {
    "attachments": {},
    "cell_type": "markdown",