Add Kotlin language features notebook

Author: yostane

material/conferences/2025-03-26-voxxed-bucharest/01-language.ipynb

@@ -0,0 +1,115 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Kotlin Language features\n",
+    "\n",
+    "## Basic features"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The sum is 3\n",
+      "The globalValue is -> I am a global value\n",
+      "small\n",
+      "small\n",
+      "Français\n",
+      "1\n",
+      "2\n",
+      "3\n",
+      "6\n",
+      "4\n",
+      "2\n",
+      "0\n",
+      "Hello\n",
+      "world\n"
+     ]
+    }
+   ],
+   "source": [
+    "// Functions can be declared outside of classes\n",
+    "fun sum(x:Int, y:Int) : Int {\n",
+    "    return x + y\n",
+    "} // function definition\n",
+    "\n",
+    "\n",
+    "val globalValue = \"I am a global value\"\n",
+    "\n",
+    "\n",
+    "var a: Int = 0 // variable\n",
+    "a = 23\n",
+    "\n",
+    "val b: String = \"Hello\" // immutable variable\n",
+    "//b = \"World\" //error\n",
+    "\n",
+    "var message = \"Hello\" // Type is inferred\n",
+    "\n",
+    "val total = sum(2, 1) // call sum function    \n",
+    "println(\"The sum is ${total}\") // interpolation\n",
+    "println(\"The globalValue is -> $globalValue\")\n",
+    "\n",
+    "val testResult1 = if (total > 3) { \n",
+    "    \"Big\" \n",
+    "} else {\n",
+    "    \"small\"\n",
+    "}  \n",
+    "println(testResult1)\n",
+    "\n",
+    "val testResult2 = if (total > 3) \"Big\" else \"small\"\n",
+    "println(testResult2)\n",
+    "\n",
+    "val greeting = \"Bonjour\"\n",
+    "val language = when(greeting){\n",
+    "    \"Bonjour\",\"salut\" -> \"Français\"\n",
+    "    \"Good morning\" -> \"English\"\n",
+    "    else -> \"Unknown\"\n",
+    "}\n",
+    "println(language)\n",
+    "\n",
+    "for (i in 1..3) println(i) // single line\n",
+    "for (i in 6 downTo 0 step 2) println(i)\n",
+    "for (msg in arrayOf(\"Hello\", \"world\")) {\n",
+    "    println(msg)\n",
+    "}\n",
+    "var x = 2\n",
+    "while (x > 0) {\n",
+    "    x--\n",
+    "}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Null safety"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Kotlin",
+   "language": "kotlin",
+   "name": "kotlin"
+  },
+  "language_info": {
+   "codemirror_mode": "text/x-kotlin",
+   "file_extension": ".kt",
+   "mimetype": "text/x-kotlin",
+   "name": "kotlin",
+   "nbconvert_exporter": "",
+   "pygments_lexer": "kotlin",
+   "version": "1.9.23"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}