Add file with random exercises

Author: gjbex

source_code/exercises.ipynb

@@ -0,0 +1,159 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "7ea52ac8-def9-4fa6-ad62-437fb876c85b",
+   "metadata": {},
+   "source": [
+    "Some random programming exercises."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "2eea84dc-48b1-4582-835f-ac084837f56d",
+   "metadata": {},
+   "source": [
+    "## Contains digit\n",
+    "\n",
+    "Write a function that returns `True` if a given number contains a given digit, `False` otherwise."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "b3a54ce5-354e-4525-aa1e-f6fcb85f7fc1",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def has_digit(n, digit):\n",
+    "    while n > 0:\n",
+    "        if n % 10 == digit:\n",
+    "            return True\n",
+    "        n //= 10\n",
+    "    return False"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "2823f917-cd56-4e0f-bbaf-69bc6c59b339",
+   "metadata": {},
+   "source": [
+    "Test the implmentation, taking edge cases into account."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "711c7090-69b5-42fe-b986-dc498f2ee6a3",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "34901 has digit 0\n",
+      "34901 has digit 1\n",
+      "no 2 in 34901\n",
+      "34901 has digit 3\n",
+      "34901 has digit 4\n",
+      "no 5 in 34901\n",
+      "no 6 in 34901\n",
+      "no 7 in 34901\n",
+      "no 8 in 34901\n",
+      "34901 has digit 9\n"
+     ]
+    }
+   ],
+   "source": [
+    "n = 34901\n",
+    "for digit in range(10):\n",
+    "    if has_digit(n, digit):\n",
+    "        print(f'{n} has digit {digit}')\n",
+    "    else:\n",
+    "        print(f'no {digit} in {n}')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "e6d1d4c6-480c-43ff-a422-87dd7090a205",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "no 0 in 3491\n",
+      "3491 has digit 1\n",
+      "no 2 in 3491\n",
+      "3491 has digit 3\n",
+      "3491 has digit 4\n",
+      "no 5 in 3491\n",
+      "no 6 in 3491\n",
+      "no 7 in 3491\n",
+      "no 8 in 3491\n",
+      "3491 has digit 9\n"
+     ]
+    }
+   ],
+   "source": [
+    "n = 3491\n",
+    "for digit in range(10):\n",
+    "    if has_digit(n, digit):\n",
+    "        print(f'{n} has digit {digit}')\n",
+    "    else:\n",
+    "        print(f'no {digit} in {n}')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "92538c32-190b-4e6f-bd96-6a4fef1ce54c",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "has_digit(210, 0)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "259a311a-edfc-4c82-9239-5162c797df72",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "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": "3.10.4"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}