diff --git a/2_conditional_statements.ipynb b/2_conditional_statements.ipynb
index 50314f3..e80a025 100644
--- a/2_conditional_statements.ipynb
+++ b/2_conditional_statements.ipynb
@@ -60,7 +60,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -103,9 +103,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "b is greater\n"
+     ]
+    }
+   ],
    "source": [
     "if a > b: # Here we are trying to find if a is greater than b\n",
     "    print('a is greater')\n",
@@ -167,9 +175,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "b is greater than a or both are equal\n"
+     ]
+    }
+   ],
    "source": [
     "if a > b: # Here we are trying to find if which is greater, a or b\n",
     "    print('a is greater')  \n",
@@ -179,9 +195,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "b is greater\n"
+     ]
+    }
+   ],
    "source": [
     "if a > b: # Here we are trying to find if a is greater than b\n",
     "    print('a is greater')\n",
@@ -214,9 +238,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "b is greater\n",
+      "Done!\n"
+     ]
+    }
+   ],
    "source": [
     "if a > b: # Here we are trying to find if a is greater than b\n",
     "    print('a is greater')\n",
@@ -394,6 +427,11 @@
     "## More examples"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": []
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -403,9 +441,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The number is positive.\n"
+     ]
+    }
+   ],
    "source": [
     "number = int(input(\"Enter a number: \"))\n",
     "\n",
@@ -433,9 +479,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Your grade is: F\n"
+     ]
+    }
+   ],
    "source": [
     "percentage = float(input(\"Enter the percentage: \"))\n",
     "\n",
@@ -493,9 +547,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The number is positive and even.\n"
+     ]
+    }
+   ],
    "source": [
     "number = int(input(\"Enter a number: \"))\n",
     "\n",
@@ -532,9 +594,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "c is the greatest\n"
+     ]
+    }
+   ],
    "source": [
     "a = 5 \n",
     "b = 10\n",
@@ -628,9 +698,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The number is positive.\n",
+      "The number is odd.\n"
+     ]
+    }
+   ],
    "source": [
     "number = int(input(\"Enter a number: \"))\n",
     "\n",
@@ -677,10 +756,27 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "a is greater than b\n"
+     ]
+    }
+   ],
+   "source": [
+    "a = int(input(\"Enter a number a = \"))\n",
+    "b = int(input(\"Enter a number b = \"))\n",
+    "if a > b:\n",
+    "    print(\"a is greater than b\")\n",
+    "elif a < b:\n",
+    "    print(\"b is greater than a\")\n",
+    "else:\n",
+    "    print(\"a and b are equal\")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -697,10 +793,31 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "execution_count": 21,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Your grade is: 89 Grade:  B\n"
+     ]
+    }
+   ],
+   "source": [
+    "grad = int(input(\"Enter your grade: \"))\n",
+    "print(\"Your grade is:\", grad, \"Grade: \", end=\" \")\n",
+    "if grad >= 90:\n",
+    "    print(\"A\")\n",
+    "elif grad >= 80:\n",
+    "    print(\"B\")\n",
+    "elif grad >= 70:\n",
+    "    print(\"C\")\n",
+    "elif grad >= 60:\n",
+    "    print(\"D\")\n",
+    "else:\n",
+    "    print(\"F\")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -749,10 +866,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "execution_count": 27,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The character ä is not an english letter.\n"
+     ]
+    }
+   ],
+   "source": [
+    "vowel = \"aeiouy\"\n",
+    "consonant = \"bcdfghjklmnpqrstvwxz\"\n",
+    "c = input(\"Enter a letter : \")\n",
+    "if c.lower() in vowel:\n",
+    "    print(f\"The letter {c} is a vowel.\")\n",
+    "elif c.lower() in consonant:\n",
+    "    print(f\"The letter {c} is a consonant.\")\n",
+    "else:\n",
+    "    print(f\"The character {c} is not an english letter.\")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -777,15 +912,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
+   "execution_count": 31,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The number -565 is odd.\n"
+     ]
+    }
+   ],
+   "source": [
+    "n = input(\"Enter an integer number: \")\n",
+    "if n.isdigit() or (n[0] == \"-\" and n[1:].isdigit()):\n",
+    "    n = int(n)\n",
+    "    if n % 2 == 0:\n",
+    "        print(f\"The number {n} is even.\")\n",
+    "    elif n % 2 != 0:\n",
+    "        print(f\"The number {n} is odd.\")\n",
+    "    else:\n",
+    "        print(f\"The number {n} is zero.\")\n",
+    "else:\n",
+    "    print(f\"{n} is not enter an integer number.\")\n",
+    "        "
+   ]
   }
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "Python 3",
    "language": "python",
    "name": "python3"
   },
@@ -799,7 +955,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.13.1"
   }
  },
  "nbformat": 4,